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📚Eubacteria

1.Which of the following is a characteristic of Eubacteria?
A. Lack of cell wall
B. Presence of peptidoglycan
C. Multicellular
D. Eukaryotic cells

Answer: B. Presence of peptidoglycan

2.What is the shape of cocci bacteria?
A. Rod-shaped
B. Spiral-shaped
C. Spherical
D. Filamentous    

Answer: C. Spherical

3.Which of the following is a common method for classifying Eubacteria?
A. By color
B. By shape
C. By size
D. By habitat

Answer: B. By shape

4.What type of bacteria can perform photosynthesis?
A. Anaerobic bacteria
B. Cyanobacteria
C. Chemoautotrophic bacteria
D. Pathogenic bacteria

Answer: B. Cyanobacteria

5. Which of the following is NOT a way bacteria can reproduce?
A. Binary fission
B. Budding
C. Fragmentation
D. Mitosis

Answer: D. Mitosis

📚Archaea

6. Archaea are known for thriving in what type of environments?
A. Extreme environments
B. Temperate environments
C. Polluted environments
D. Aquatic environments

Answer: A. Extreme environments

7.Which of the following best describes the cell membranes of Archaea?
A. Composed of phospholipids only
B. Composed of ether-linked lipids
C. Composed of cholesterol
D. Composed of peptidoglycan

Answer: B. Composed of ether-linked lipids

8.Which group of Archaea is known for producing methane?
A. Halophiles
B. Thermophiles
C. Methanogens
D. Acidophiles

Answer: C. Methanogens

9.What distinguishes Archaea from Eubacteria at a genetic level?
A. Differences in ribosomal RNA sequences
B. Presence of peptidoglycan in cell wall
C. Similar cell membrane structure
D. Lack of circular chromosomes

Answer: A. Differences in ribosomal RNA sequences

10.Which of the following Archaea can thrive in salty environments?
A. Psychrophiles
B. Halophiles
C. Thermophiles
D. Methanogens 

Answer: B. Halophiles

📚Fungi

11.What is the primary structure of fungi?
A. Cells with chloroplasts
B. Hyphae
C. Mycelium
D. Spores

Answer: B. Hyphae

12. Which of the following is NOT a characteristic of fungi?
A. Eukaryotic cells
B. Photosynthetic
C. Heterotrophic
D. Cell walls made of chitin

Answer:  B. Photosynthetic

13.Fungi reproduce asexually by producing:    A. Seeds
B. Spores
C. Buds
D. Conjugation

Answer: B. Spores

14.Which type of fungi forms a symbiotic relationship with plants?
A. Saprophytic fungi
B. Lichens
C. Mycorrhizal fungi
D. Parasitic fungi

Answer: C. Mycorrhizal fungi

15.What is the role of fungi in the ecosystem?
A. Producers
B. Consumers
C. Decomposers
D. Primary producers

Answer: C. Decomposers

📚Protozoa

16.Protozoa are primarily classified as:
A. Multicellular organisms
B. Prokaryotic organisms
C. Unicellular eukaryotic organisms
D. Photosynthetic organisms

Answer: C. Unicellular eukaryotic organisms

17.Which structure helps some protozoa move?
A. Cilia
B. Cell wall
C. Hyphae
D. Spore

Answer: A. Cilia

18.Which of the following is a parasitic protozoan?
A. Amoeba
B. Paramecium
C. Plasmodium
D. Euglena

Answer: C. Plasmodium

19.Protozoa can reproduce by:
A. Only sexual reproduction
B. Only asexual reproduction
C. Both asexual and sexual reproduction
D. Budding

Answer: C. Both asexual and sexual reproduction

20.What type of nutrition do most protozoa use?
A. Autotrophic
B. Heterotrophic
C. Decomposers
D. Photosynthetic

Answer: B. Heterotrophic

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Barumsa barbaaddan tuquudhaan viidiyoo barbaaddan argachuu dandeessu 👇👇👇

Maths Grade 11 unit 3
Maths Grade 11 unit 3


Maths Grade 11 unit 4
Maths Grade 11 unit 4


Maths Grade 11 unit 5
Maths Grade 11 unit 5


Maths Grade 11 unit 6
Maths Grade 11 unit 6


Maths Grade 12 unit 2
Maths Grade 12 unit 2


Maths Grade 12 unit 3
Maths Grade 12 unit 3


Maths Grade 12 unit 4
Maths Grade 12 unit 4


Maths Grade 12 unit 5
Maths Grade 12 unit 5


Physics Grade 11 unit 3
Physics Grade 11 unit 3


Physics Grade 11 unit 4
Physics Grade 11 unit 4


Physics Grade 12 unit 2
Physics Grade 12 unit 2


Maths Grade 12 unit 3
Maths Grade 12 unit 3


Chemistry Grade 11 unit 2
Chemistry Grade 11 unit 2


Chemistry Grade 12 unit 2
Chemistry Grade 12 unit 2


English Grade 11&12
English Grade 11&12


Biology Grade 11 unit 2
Biology Grade 11 unit 2


Maths Grade 10 Unit 2
Maths Grade 10 unit 2


History Grade 11 unit 3
History Grade 11 unit 3


Geography Grade 11 unit 1
Geography Grade 11 unit 1


Geography Grade 12 Unit 1
Geography Grade 12 Unit
1

Math's 2002 - 2016 UEE
Math's 2002 - 2016 UEE


Biology Grade 12 unit 3
Biology Grade 12 unit 3


Math's Grade 9 unit 4
Math's Grade 9 unit 4


History Grade 11 Unit 4
History Grade 11 Unit 4


Geography Grade 11 Unit 3
Geography Grade 11 Unit 3


Aptitude
Aptitude


Math's Grade 10 Unit 3
Math's Grade 10 Unit 3


Math's Grade 11 Unit 7
Math's Grade 11 Unit 7


Chemistry, Economics, and others coming soon....


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https://linkbaza.com/catalog/-1001234566349 Mon, 18 Aug 2025 21:08:01 +0300
▎Questions: maths part Aptitude


1. A car travels 60 km in 1 hour. How far will it travel in 2.5 hours at the same speed?
   a) 120 km 
   b) 150 km 
   c) 180 km 
   d) 200 km 

2. If a book costs $20 and you buy 3 books, how much do you spend in total?
   a) $50 
   b) $60 
   c) $70 
   d) $80 

3. A train leaves the station at 3 PM and arrives at its destination at 5 PM. What is the duration of the journey?
   a) 1 hour 
   b) 1.5 hours 
   c) 2 hours 
   d) 2.5 hours 

4. If a man can complete a work in 10 days, how much work will he complete in 3 days?
   a) 1/3 of the work 
   b) 1/4 of the work 
   c) 1/2 of the work 
   d) 3/10 of the work 

5. A person has $1000 and spends $250 each month. How many months will it take to spend all his money?
   a) 2 months 
   b) 3 months 
   c) 4 months 
   d) 5 months 

6. If a factory produces 200 units of a product in an hour, how many units will it produce in 8 hours?
   a) 1200 units 
   b) 1400 units 
   c) 1600 units 
   d) 1800 units 

7. A recipe requires 2 cups of flour for every batch of cookies. How many cups of flour are needed for 5 batches?
   a) 8 cups 
   b) 9 cups 
   c) 10 cups 
   d) 11 cups 

8. If a person reads 30 pages of a book each day, how many pages will they read in a week?
   a) 150 pages 
   b) 180 pages 
   c) 210 pages 
   d) 240 pages 

9. A bicycle costs $300 and is on sale for a discount of 25%. What is the sale price?
   a) $200 
   b) $225 
   c) $250 
   d) $275 

10. If an item is marked at $150 and there is a tax of 10%, what is the total cost after tax?
    a) $155 
    b) $160 
    c) $165 
    d) $170 

11. A worker earns $15 per hour. How much will he earn for working 40 hours in a week?
    a) $500 
    b) $600 
    c) $700 
    d) $800 

12. If there are 24 students in a class and each student has 3 notebooks, how many notebooks are there in total?
    a) 60 notebooks 
    b) 70 notebooks 
    c) 72 notebooks 
    d) 80 notebooks 

13. A car can travel 300 miles on a full tank of gas. How far can it travel on half a tank?
    a) 100 miles 
    b) 150 miles 
    c) 200 miles 
    d) 250 miles 

14. If you save $50 every month, how much will you have saved after one year?
    a) $500 
    b) $600 
    c) $700 
    d) $800 

15. A box contains 12 apples. If you eat 3 apples, what fraction of the apples is left?
    a) 1/4 
    b) 1/3 
    c) 2/3 
    d) 3/4 

▎Answers:

1. b) 150 km

2. b) $60

3. c) 2 hours

4. d) 3/10 of the work

5. c) 4 months

6. c) 1600 units

7. c) 10 cups

8. b) 210 pages

9. b) $225

10. c) $165

11. b) $600

12. c) 72 notebooks

13. c) 150 miles

14. b) $600

15. c) 3/4
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https://linkbaza.com/catalog/-1001234566349 Sun, 17 Aug 2025 21:06:01 +0300
Biology multiple-choice questions related to microorganisms along with their answers

1. Which of the following is a characteristic of prokaryotic cells?
   A) Membrane-bound organelles 
   B) Nucleus 
   C) Circular DNA 
   D) Multicellular organization 

Answer: C - Circular DNA

2. What is the primary role of bacteria in the nitrogen cycle?
   A) Nitrogen fixation 
   B) Photosynthesis 
   C) Decomposition 
   D) Respiration 

Answer: A - Nitrogen fixation

3. Which of the following microorganisms is used in the production of yogurt?
   A) Saccharomyces cerevisiae 
   B) Lactobacillus bulgaricus 
   C) Escherichia coli 
   D) Streptococcus pneumoniae 

Answer: B - Lactobacillus bulgaricus

4. Antibiotics are effective against which type of organism?
   A) Viruses 
   B) Fungi 
   C) Bacteria 
   D) All of the above

Answer: C - Bacteria

5. Which structure is found in viruses but not in bacteria?
   A) Cell wall 
   B) RNA or DNA 
   C) Plasma membrane 
   D) Ribosomes 

Answer: B - RNA or DNA

6. What process do yeast cells primarily undergo to produce energy under anaerobic conditions?
   A) Fermentation 
   B) Aerobic respiration 
   C) Photosynthesis 
   D) Chemosynthesis 

Answer: A - Fermentation

7. Which of the following diseases is caused by a virus?
   A) Tuberculosis 
   B) Malaria 
   C) Influenza 
   D) Fungal infections 

Answer: C - Influenza

8. Which microorganism is known for its role in bioremediation?
   A) Lactobacillus 
   B) Pseudomonas 
   C) Penicillium 
   D) Saccharomyces 

Answer: B - Pseudomonas

9. The Gram stain is used to differentiate bacteria based on what characteristic?
   A) Shape 
   B) Size 
   C) Cell wall composition 
   D) Metabolic activity 

Answer: C - Cell wall composition

10. Which of the following is a beneficial effect of microorganisms?
    A) Causing disease 
    B) Decomposing organic matter 
    C) Producing toxins 
    D) Contaminating food 

Answer: B - Decomposing organic matter

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https://linkbaza.com/catalog/-1001234566349 Fri, 15 Aug 2025 21:04:01 +0300
Introduction to Organic Chemistry (20 Questions)

1. Organic chemistry is primarily the study of compounds containing:
  a) Metals
  b) Carbon
  c) Acids
  d) Salts

2. Why is carbon so versatile in forming compounds?
  a) It has a low atomic mass
  b) It can form four covalent bonds
  c) It is a good conductor of electricity
  d) It is abundant in the Earth's crust

3. Carbon can form strong covalent bonds with:
  a) Only hydrogen
  b) Only oxygen
  c) Other carbon atoms, hydrogen, oxygen, nitrogen, and halogens
  d) Only metals

4. A chain of carbon atoms is called a:
  a) Ring structure
  b) Functional group
  c) Carbon skeleton or backbone
  d) Polymer

5. Hydrocarbons are organic compounds that contain:
  a) Carbon, hydrogen, and oxygen
  b) Carbon and hydrogen only
  c) Carbon, hydrogen, and nitrogen
  d) Carbon and oxygen only

6. Alkanes are hydrocarbons that contain:
  a) Only single bonds
  b) At least one double bond
  c) At least one triple bond
  d) Aromatic rings

7. Alkenes are hydrocarbons that contain:
  a) Only single bonds
  b) At least one double bond
  c) At least one triple bond
  d) Aromatic rings

8. Alkynes are hydrocarbons that contain:
  a) Only single bonds
  b) At least one double bond
  c) At least one triple bond
  d) Aromatic rings

9. Aromatic hydrocarbons contain:
  a) Only single bonds
  b) At least one double bond
  c) At least one triple bond
  d) A cyclic (ring) structure with alternating single and double bonds

10. A group of atoms within a molecule that is responsible for the characteristic chemical reactions of that molecule is called a:
  a) Carbon skeleton
  b) Functional group
  c) Polymer
  d) Isomer

11. Which of the following is a hydroxyl group?
  a) -COOH
  b) -NH2
  c) -OH
  d) -CHO

12. Which of the following is a carbonyl group?
  a) -OH
  b) -COOH
  c) -CHO
  d) -NH2

13. Which of the following is a carboxyl group?
  a) -NH2
  b) -COOH
  c) -CHO
  d) -OH

14. Which of the following is an amino group?
  a) -OH
  b) -COOH
  c) -NH2
  d) -CHO

15. Alcohols contain which functional group?
  a) Carboxyl group
  b) Amino group
  c) Hydroxyl group
  d) Carbonyl group

16. Carboxylic acids contain which functional group?
  a) Hydroxyl group
  b) Amino group
  c) Carbonyl group
  d) Carboxyl group

17. Amines contain which functional group?
  a) Hydroxyl group
  b) Amino group
  c) Carboxyl group
  d) Carbonyl group

18. Aldehydes contain which functional group?
  a) Hydroxyl group
  b) Carbonyl group (at the end of the carbon chain)
  c) Carboxyl group
  d) Amino group

19. Ketones contain which functional group?
  a) Carboxyl group
  b) Carbonyl group (within the carbon chain)
  c) Hydroxyl group
  d) Amino group

20. Isomers are molecules that have:
  a) The same molecular formula but different structural formulas
  b) The same structural formula but different molecular formulas
  c) Different elements
  d) Different functional groups

Answers

1. b
2. b
3. c
4. c
5. b
6. a
7. b
8. c
9. d
10. b
11. c
12. c
13. b
14. c
15. c
16. d
17. b
18. b
19. b
20. a

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https://linkbaza.com/catalog/-1001234566349 Wed, 13 Aug 2025 21:02:01 +0300
1. What is an enzyme?

•  A type of carbohydrate
•  A protein that catalyzes biochemical reactions
•  A lipid that stores energy
•  A nucleic acid that carries genetic information

2. Which of the following is a general property of enzymes? They:

•  are consumed in reactions.
•  lower the activation energy of reactions.
•  can function at only one temperature.
•  are always active.

3. What is the primary function of enzymes? To:

•  provide structural support
•  store genetic information
•  catalyze biochemical reactions
•  transport substances across membranes

4. Enzymes are specific to their substrates because of:

•  size
•  color
•  charge
•  shape

5. Which level of protein structure involves the sequence of amino acids?

•  Primary structure
•  Secondary structure
•  Tertiary structure
•  Quaternary structure

6. The folding of a polypeptide into a three-dimensional shape is referred to as:

•  Primary structure
•  Secondary structure
•  Tertiary structure
•  Quaternary structure

7. Which model describes the interaction between an enzyme and its substrate as a lock and key?

•  Induced fit model
•  Lock and key model
•  Transition state model
•  Allosteric model

8. The induced fit model suggests that:

•  The enzyme's active site is rigid.
•  Enzymes do not interact with substrates.
•  The enzyme changes shape to fit the substrate.
•  Substrates can bind without any structural change.

9. In enzyme-substrate binding, what is formed when an enzyme binds to its substrate?

•  Product
•  Inhibitor
•  Coenzyme
•  Enzyme-substrate complex

10. What happens to the enzyme after the reaction is complete?

•  It is permanently altered.
•  It becomes inactive.
•  It must be destroyed.
•  It remains unchanged and can be reused.

Answers


1. A protein that catalyzes biochemical reactions
2. lower the activation energy of reactions.
3. catalyze biochemical reactions
4. shape
5. Primary structure
6. Tertiary structure
7. Lock and key model
8. The enzyme changes shape to fit the substrate.
9. Enzyme-substrate complex
10. It remains unchanged and can be reused.

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Waliif Qoodaa 💟🙏
Barsiisota Barbaada

Ministeera Barnootaa

Ministeerri Barnootaa Manneen Barnootaa Sadarkaa Lammaffaa Bultii Addaa haaraa ijaaraman bara barnootaa 2018tti hojii eegaluuf barsiisota gahumsa qaban barbaada.

Kanaafuu barsiisonni ulaagaa armaan gadii guuttan galmee Karaa online 👇
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Galmeen:7-27/12/2017


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Maths Grade 11 unit 3
Maths Grade 11 unit 3


Maths Grade 11 unit 4
Maths Grade 11 unit 4


Maths Grade 11 unit 5
Maths Grade 11 unit 5


Maths Grade 11 unit 6
Maths Grade 11 unit 6


Maths Grade 12 unit 2
Maths Grade 12 unit 2


Maths Grade 12 unit 3
Maths Grade 12 unit 3


Maths Grade 12 unit 4
Maths Grade 12 unit 4


Maths Grade 12 unit 5
Maths Grade 12 unit 5


Physics Grade 11 unit 3
Physics Grade 11 unit 3


Physics Grade 11 unit 4
Physics Grade 11 unit 4


Physics Grade 12 unit 2
Physics Grade 12 unit 2


Maths Grade 12 unit 3
Maths Grade 12 unit 3


Chemistry Grade 11 unit 2
Chemistry Grade 11 unit 2


Chemistry Grade 12 unit 2
Chemistry Grade 12 unit 2


English Grade 11&12
English Grade 11&12


Biology Grade 11 unit 2
Biology Grade 11 unit 2


Maths Grade 10 Unit 2
Maths Grade 10 unit 2


History Grade 11 unit 3
History Grade 11 unit 3


Geography Grade 11 unit 1
Geography Grade 11 unit 1


Geography Grade 12 Unit 1
Geography Grade 12 Unit
1

Math's 2002 - 2016 UEE
Math's 2002 - 2016 UEE


Biology Grade 12 unit 3
Biology Grade 12 unit 3


Math's Grade 9 unit 4
Math's Grade 9 unit 4


History Grade 11 Unit 4
History Grade 11 Unit 4


Geography Grade 11 Unit 3
Geography Grade 11 Unit 3


Aptitude
Aptitude


Math's Grade 10 Unit 3
Math's Grade 10 Unit 3


Math's Grade 11 Unit 7
Math's Grade 11 Unit 7


Chemistry, Economics, and others coming soon....


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Aptitude multiple-choice questions focused on Logical Reasoning, specifically covering patterns, sequence
1. What is the next number in the sequence: 2, 4, 8, 16, ...?
   a) 20 
   b) 24 
   c) 32 
   d) 36 

2. Which of the following completes the analogy: Finger is to Hand as Toe is to...?
   a) Foot 
   b) Leg 
   c) Arm 
   d) Body 

3. What is the next letter in the sequence: A, C, E, G, ...?
   a) H 
   b) I 
   c) J 
   d) K 

4. If the pattern is: 1, 1, 2, 3, 5, 8, ..., what is the next number?
   a) 10 
   b) 11 
   c) 12 
   d) 13 

5. Which of the following shapes does not belong in this group: Circle, Square, Triangle, Rectangle, Sphere?
   a) Circle 
   b) Square 
   c) Triangle 
   d) Sphere 

6. Find the missing number in the series: 5, 10, 20, ?, 80.
   a) 30 
   b) 40 
   c) 50 
   d) 60 

7. Which word is the odd one out?
   a) Apple 
   b) Banana 
   c) Carrot 
   d) Grape 

8. What comes next in this pattern: O, T, T, F, F, S, S, ...?
   a) E 
   b) N 
   c) T 
   d) R 

9. Which of the following pairs is not an analogy?
   a) Cat : Kitten 
   b) Dog : Puppy 
   c) Cow : Bull 
   d) Fish : School 

10. If the sequence is: 2, 6, 12, 20, ..., what is the next number?
    a) 30 
    b) 28 
    c) 26 
    d) 24 

11. What is the next term in the series: 3, 6, 11, 18, ...?
    a) 25 
    b) 26 
    c) 27 
    d) 28 

12. Which number does not belong in this series: 3, 6, 9, 12, 15, 18, 20?
    a) 3 
    b) 6 
    c) 18 
    d) 20 

13. Complete the analogy: Book is to Read as Knife is to...?
    a) Cut 
    b) Cook 
    c) Eat 
    d) Slice 

14. What comes next in this sequence of letters: D, F, H, J, ...?
    a) K 
    b) L 
    c) M 
    d) N 

15. If the pattern is: 1, 4, 9, 16, ..., what is the next number?
    a) 20 
    b) 25 
    c) 30 
    d) 36 

▎Answers

1. c) 32

2. a) Foot

3. a) I

4. d) 13

5. d) Sphere

6. b) 40

7. c) Carrot

8. a) E

9. d) Fish : School

10. b) 28

11. a) 25

12. d) 20

13. a) Cut

14. a) K

15. b) 25


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Multiple-choice Questions about microbiology, focusing on bacteria, viruses, fungi, and their roles in ecosystems:

1. What is the primary role of decomposer bacteria in an ecosystem?
   A) Photosynthesis 
   B) Nitrogen fixation 
   C) Breakdown of organic matter 
   D) Oxygen production 

2. Which of the following is a characteristic of viruses?
   A) They can reproduce independently. 
   B) They are made up of cells. 
   C) They require a host cell to replicate. 
   D) They can metabolize nutrients. 

3. What type of microorganism is penicillin derived from?
   A) Bacteria 
   B) Virus 
   C) Fungi 
   D) Protozoa 

4. Which of the following bacteria is known for nitrogen fixation in soil?
   A) Escherichia coli 
   B) Rhizobium 
   C) Streptococcus 
   D) Lactobacillus 

5. What is the function of mycorrhizal fungi in ecosystems?
   A) Decomposition of organic matter 
   B) Photosynthesis 
   C) Symbiotic relationship with plant roots 
   D) Pathogen control 

6. Which virus is responsible for the common cold?
   A) Influenza virus 
   B) Rhinovirus 
   C) HIV 
   D) Herpes simplex virus 

7. What is the main component of bacterial cell walls?
   A) Cellulose 
   B) Chitin 
   C) Peptidoglycan 
   D) Protein 

8. Which of the following is NOT a method of bacterial reproduction?
   A) Binary fission 
   B) Budding 
   C) Fragmentation 
   D) Mitosis 

9. Fungi play a crucial role in which of the following processes?
   A) Nitrogen fixation 
   B) Carbon cycling 
   C) Oxygen production 
   D) Photosynthesis 

10. What type of pathogen is Candida albicans?
    A) Bacteria 
    B) Virus 
    C) Fungus 
    D) Protozoa 

11. Which of the following is a beneficial role of bacteria in the human gut?
    A) Causing disease 
    B) Producing vitamins 
    C) Breaking down toxins 
    D) Both B and C 

12. What is the primary way that viruses are classified?
    A) By their size 
    B) By their shape 
    C) By their genetic material (DNA or RNA) 
    D) By their color 

13. Which of the following best describes mycorrhizae?
    A) A type of bacteria that lives in soil 
    B) A symbiotic association between fungi and plant roots 
    C) A pathogenic fungus that affects plants 
    D) A virus that infects plant cells 

14. Which microorganism is primarily responsible for fermentation in food production?
    A) Bacteria 
    B) Viruses 
    C) Fungi 
    D) Protozoa 

15. Which group of microorganisms is known for producing antibiotics?
    A) Viruses 
    B) Fungi and bacteria 
    C) Protozoa 
    D) Algae 

▎Answers

1. C) Breakdown of organic matter

2. C) They require a host cell to replicate.

3. C) Fungi

4. B) Rhizobium

5. C) Symbiotic relationship with plant roots

6. B) Rhinovirus

7. C) Peptidoglycan

8. D) Mitosis

9. B) Carbon cycling

10. C) Fungus

11. D) Both B and C

12. C) By their genetic material (DNA or RNA)

13. B) A symbiotic association between fungi and plant roots

14. C) Fungi

15. B) Fungi and bacteria


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1. How is a capacitor connected in a circuit to measure its effect on AC?
  •  In series
  •  In parallel
  •  Either series or parallel
  •  None of the above

2. What is the main role of a dielectric in a capacitor?
  •  To conduct electricity
  •  To increase resistance
  •  To increase capacitance
  •  To decrease charge storage

3. Which combination of capacitors will result in a total capacitance that is less than the smallest capacitance in the group?
  •  Parallel combination
  •  Series combination
  •  Both series and parallel
  •  None of the above

4. The force between charges on a capacitor's plates increases with?
  •  Distance between the plates
  •  Charge on the plates
  •  Area of the plates
  •  Dielectric strength

5. What happens to the electric field between the plates when a dielectric is inserted?
  •  It increases
  •  It decreases
  •  It remains the same
  •  It becomes zero

6. If the area of the plates of a parallel plate capacitor is doubled, what happens to the capacitance?
  •  It halves
  •  It doubles
  •  It stays the same
  •  It triples

7. A capacitor can store more energy with a larger plate area?
  •  True
  •  False

8. Dielectrics are good conductors of electricity.
  •  True
  •  False

9. Capacitance is directly proportional to the distance between the plates.
  •  True
  •  False

10. Inserting a dielectric decreases the capacitance of a capacitor.
  •  True
  •  False

Answers

1. •  In series


2. •  To increase capacitance


3. •  Series combination


4. •  Charge on the plates


5.  •  It decreases


6. •  It doubles


7.  •  True


8.  •  False


9. •  False


10. •  False

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Biology Grade 11 Unit 5 Human Body Systems Part 1👇👇👇👇👇

Biology 💯 💯 💯 💯 💯 💯 💯 💯
Ajab yaa dandeettii!!!

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📌 20 chemistry  multiple-choice questions with their answers:

1. What is the atomic number of carbon?

A) 6

B) 12

C) 14

D) 8
Answer: A) 6

2. Which of the following is a noble gas?

A) Oxygen

B) Nitrogen

C) Argon

D) Hydrogen
Answer: C) Argon

3. What is the chemical formula for water?

A) H2O2

B) H2O

C) O2H

D) H2O3
Answer: B) H2O

4. Which of the following represents a chemical change?

A) Melting ice

B) Dissolving sugar in water

C) Rusting iron

D) Boiling water
Answer: C) Rusting iron

5. What type of bond involves the sharing of electron pairs?

A) Ionic bond

B) Covalent bond

C) Metallic bond

D) Hydrogen bond
Answer: B) Covalent bond

6. What is the pH of a neutral solution at 25°C?

A) 0

B) 7

C) 14

D) 1
Answer: B) 7

7. Which of the following is an exothermic reaction?

A) Photosynthesis

B) Combustion

C) Melting ice

D) Dissolving salt in water
Answer: B) Combustion

8. What is the molar mass of water (H2O)?

A) 16 g/mol

B) 18 g/mol

C) 20 g/mol

D) 14 g/mol
Answer: B) 18 g/mol

9. Which of the following elements is most electronegative?

A) Fluorine

B) Oxygen

C) Nitrogen

D) Chlorine
Answer: A) Fluorine

10. What is the main component of natural gas?

A) Propane

B) Ethanol

C) Methane

D) Butane
Answer: C) Methane

11. What type of reaction is represented by the equation: A + B → AB?

A) Decomposition

B) Synthesis

C) Single replacement

D) Double replacement
Answer: B) Synthesis

12. What is the unit of pressure in the SI system?

A) Atmosphere

B) Pascal

C) Bar

D) Torr
Answer: B) Pascal

13. Which of the following is not a characteristic of acids?

A) Sour taste

B) Slippery feel

C) Turns litmus paper red

D) Reacts with metals
Answer: B) Slippery feel

14. What is the primary gas responsible for the greenhouse effect?

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen
Answer: B) Carbon dioxide
15. Which type of solution contains the maximum amount of solute that can dissolve?

A) Unsaturated

B) Saturated

C) Supersaturated

D) Concentrated
Answer: B) Saturated

16. What is the product of the reaction between an acid and a base?

A) Salt and water

B) Hydrogen gas

C) Carbon dioxide

D) Alcohol
Answer: A) Salt and water

17. Which of the following elements is a diatomic molecule in its natural state?

A) Helium

B) Sodium

C) Chlorine

D) Carbon
Answer: C) Chlorine

18. Which law states that mass is neither created nor destroyed in a chemical reaction?

A) Law of Conservation of Energy

B) Law of Definite Proportions

C) Law of Conservation of Mass

D) Dalton's Law
Answer: C) Law of Conservation of Mass
19. What is the main purpose of a catalyst in a chemical reaction?

A) Increase the temperature

B) Increase the reaction rate

C) Change the products

D) Decrease the activation energy
Answer: B) Increase the reaction rate
20. What is the process of converting a solid directly into a gas called?

A) Evaporation

B) Sublimation

C) Condensation

D) Melting
Answer: B) Sublimation

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Barumsa barbaaddan tuquudhaan viidiyoo barbaaddan argachuu dandeessu 👇👇👇

Maths Grade 11 unit 3
Maths Grade 11 unit 3


Maths Grade 11 unit 4
Maths Grade 11 unit 4


Maths Grade 11 unit 5
Maths Grade 11 unit 5


Maths Grade 11 unit 6
Maths Grade 11 unit 6


Maths Grade 12 unit 2
Maths Grade 12 unit 2


Maths Grade 12 unit 3
Maths Grade 12 unit 3


Maths Grade 12 unit 4
Maths Grade 12 unit 4


Maths Grade 12 unit 5
Maths Grade 12 unit 5


Physics Grade 11 unit 3
Physics Grade 11 unit 3


Physics Grade 11 unit 4
Physics Grade 11 unit 4


Physics Grade 12 unit 2
Physics Grade 12 unit 2


Maths Grade 12 unit 3
Maths Grade 12 unit 3


Chemistry Grade 11 unit 2
Chemistry Grade 11 unit 2


Chemistry Grade 12 unit 2
Chemistry Grade 12 unit 2


English Grade 11&12
English Grade 11&12


Biology Grade 11 unit 2
Biology Grade 11 unit 2


Maths Grade 10 Unit 2
Maths Grade 10 unit 2


History Grade 11 unit 3
History Grade 11 unit 3


Geography Grade 11 unit 1
Geography Grade 11 unit 1


Geography Grade 12 Unit 1
Geography Grade 12 Unit
1

Math's 2002 - 2016 UEE
Math's 2002 - 2016 UEE


Biology Grade 12 unit 3
Biology Grade 12 unit 3


Math's Grade 9 unit 4
Math's Grade 9 unit 4


History Grade 11 Unit 4
History Grade 11 Unit 4


Geography Grade 11 Unit 3
Geography Grade 11 Unit 3


Aptitude
Aptitude


Math's Grade 10 Unit 3
Math's Grade 10 Unit 3


Math's Grade 11 Unit 7
Math's Grade 11 Unit 7


Chemistry, Economics, and others coming soon....


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➡️ ይህ Program የሚያካትታቸው  Course Contents / Topics
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Qormaata Seensaa MB Ifa Boru Baroota darbani

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https://linkbaza.com/catalog/-1001234566349 Mon, 28 Jul 2025 21:07:01 +0300
Chemical reaction

1. Which of the following is a chemical change?
  a) Melting ice
  b) Dissolving sugar in water
  c) Burning wood
  d) Boiling water

2. A chemical equation is balanced to satisfy:
  a) The law of conservation of mass
  b) The law of definite proportions
  c) The law of multiple proportions
  d) Avogadro's Law

3. In a chemical reaction, the substances that are consumed are called:
  a) Products
  b) Reactants
  c) Catalysts
  d) Solutions

4. Which of the following is an example of a synthesis reaction?
  a) 2H₂O —> 2H₂ + O₂
  b) H₂ + Cl₂ —> 2HCl
  c) Zn + 2HCl —> ZnCl₂ + H₂
  d) CH₄ + 2O₂ —> CO₂ + 2H₂O

5. Which of the following is an example of a decomposition reaction?
  a) 2Na + Cl₂ –> 2NaCl
  b) 2H₂O₂ —> 2H₂O + O₂
  c) C + O2 —>CO₂
  d) NaOH + HCl –> NaCl + H₂O

6. A reaction that releases energy in the form of heat is called:
  a) Endothermic
  b) Exothermic
  c) Sublimation
  d) Neutralization

7. Which of the following is a type of chemical reaction that involves the transfer of electrons?
  a) Acid-base reaction
  b) Precipitation reaction
  c) Redox reaction
  d) Neutralization reaction

8. A substance that speeds up the rate of a chemical reaction without being consumed in the reaction is called:
  a) Product
  b) Reactant
  c) Catalyst
  d) Inhibitor

9. What type of reaction is represented by the following equation? AB + CD -> AD + CB
  a) Synthesis
  b) Decomposition
  c) Single Replacement
  d) Double Replacement

10. What is the coefficient for oxygen when the following equation is properly balanced?  C2H6 +  O2 ->  CO2 +  H2O
  a) 1
  b) 2
  c) 7
  d) 12

11. When a solid forms from a solution during a chemical reaction, the solid is called a:
  a) Precipitate
  b) Filtrate
  c) Solution
  d) Suspension

12. Which of the following factors does NOT affect the rate of a chemical reaction?
  a) Temperature
  b) Concentration of reactants
  c) Presence of a catalyst
  d) Color of the reactants

13. What is the oxidation number of oxygen in most compounds?
  a) -1
  b) 0
  c) -2
  d) +2

14. In the reaction: Fe + CuSO4 -> FeSO4 + Cu, which element is oxidized?
  a) Fe
  b) Cu
  c) S
  d) O

15. What is a neutralization reaction?
  a) A reaction between two metals.
  b) A reaction that forms a precipitate.
  c) A reaction between an acid and a base.
  d) A reaction that absorbs energy.

Answer Key:

1. c) Burning wood
2. a) The law of conservation of mass
3. b) Reactants
4. b) H₂ + Cl₂ —> 2HCl
5. b) 2H₂O₂ —> 2H₂O + O₂
6. b) Exothermic
7. c) Redox reaction
8. c) Catalyst
9. d) Double Replacement
10. c) 7
11. a) Precipitate
12. d) Color of the reactants
13. c) -2
14. a) Fe
15. c) A reaction between an acid and a base.

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https://linkbaza.com/catalog/-1001234566349 Sat, 26 Jul 2025 21:06:01 +0300
📘common physics choice questions about motion with answers.

Question 1:

A car travels 100 kilometers in 2 hours. What is its average speed?

A) 200 km/h
B) 50 km/h
C) 100 km/h
D) 25 km/h

Answer: B) 50 km/h

Explanation: Average speed is calculated by dividing the total distance traveled by the total time taken.

Question 2:

A ball is thrown straight up in the air. At its highest point, what is its velocity?

A) 0 m/s
B) 9.8 m/s
C) -9.8 m/s
D) Cannot be determined without more information

Answer: A) 0 m/s

Explanation: At the highest point, the ball momentarily stops before falling back down. Velocity is a vector quantity that includes both speed and direction, so the velocity is 0 m/s.

Question 3:

A runner completes a 400-meter race in 50 seconds. What is the runner's average speed?

A) 8 m/s
B) 10 m/s
C) 12 m/s
D) 16 m/s

Answer: A) 8 m/s

Explanation: Average speed = Total distance / Total time. 400 meters / 50 seconds = 8 m/s.

Question 4:

A car accelerates from rest to a speed of 20 m/s in 5 seconds. What is its acceleration?

A) 2 m/s²
B) 4 m/s²
C) 6 m/s²
D) 8 m/s²

Answer: B) 4 m/s²

Explanation: Acceleration is the change in velocity over time. Acceleration = (Final velocity - Initial velocity) / time = (20 m/s - 0 m/s) / 5 s = 4 m/s².

Question 5:

A ball is dropped from a height of 10 meters. Ignoring air resistance, what is the ball's velocity just before it hits the ground?

A) 9.8 m/s
B) 14 m/s
C) 19.6 m/s
D) Cannot be determined without more information

Answer: b) 14 m/s

Explanation: The acceleration due to gravity is 9.8 m/s². Using the equation: v² = u² + 2as, where:

• v = final velocity
• u = initial velocity (0 m/s)
• a = acceleration due to gravity (9.8 m/s²)
• s = distance (10 m)

We get: v² = 0² + 2  9.8  10 = 196. Therefore, v = √196 = 14 m/s.


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