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NCERT Solutions For Class 8 Science Chapter 2 Microorganisms Friend And Foe MCQs

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NCERT Solutions For Class 8 Science Chapter 2 Microorganisms Friend And Foe Multiple Choice Questions

Question 1. Yeast is used in the production of

  1. Sugar
  2. Alcohol
  3. Hydrochloride Acid
  4. Oxygen

Answer: 2. Alcohol is produced by the action of yeast.

Question 2. The following is an antibiotic

  1. Sodium Bicarbonate
  2. Streptomycin
  3. Alcohol
  4. Yeast

Answer: 2. Streptomycin is an antibiotic.

NCERT Solutions for Microorganisms Friend and Foe MCQs

Question 3. Carriers of the malaria-causing protozoan are

  1. Female Anopheles mosquito
  2. Cockroach
  3. Housefly
  4. Butterfly

Answer: 1. The Female Anopheles mosquito is the carrier of malaria. It picks up the parasite of the disease from an infected person when it bites to obtain blood.

MCQ On bacteria, Fungi, Viruses, Protozoa, Algae, Class 8 Science

Question 4. The most common carrier of communicable diseases is

  1. Ant
  2. Housefly
  3. Dragonfly
  4. Spider

Answer: 2. The Housefly is the most common carrier of communicable disease.

NCERT Solutions For Class 8 Science Chapter 2 Microorganisms Friend And Foe MCQs

Question 5. The bread or idle dough rises because of

  1. Heat
  2. Grinding
  3. Growth of yeast cells
  4. Kneading

Answer: 3. The bread or idli dough rises because of the growth of yeast cells.

Question 6. The process of converting sugar into alcohol is called

  1. Nitrogen fixation
  2. Moulding
  3. Fermentation
  4. Infection

Answer: 3. Fermentation is the process of conversion of sugar into alcohol.

NCERT Class 8 Science Chapter 2 Microorganisms MCQs

Question 7. The growth of white patches that develop on moist brood during rainy nonson are

  1. Fungi
  2. Potozoan
  3. Bacteria
  4. Virus

Answer: 1. Fungi

NCERT Solutions For Class 8 Science Chapter 2 Microorganisms Friend And Foe Multiple Choice Questions

Question 8. Diseases like dysentery and malaria are caused by

  1. Protozoans
  2. Algae
  3. Fungi
  4. Bacteria

Answer: 1. Protozoans

Question 9. Spirogyra is

  1. An algae
  2. A fungi
  3. A bacteria
  4. A protozoan

Answer: 1. An alga

Question 10. Chlamydomonas and Amoeba are examples of

  1. Protozoan And Virus
  2. Fungi And Algae
  3. Algae And Protozoan
  4. Virus And Bacteria

Answer: 3. Algae And Protozoan

NCERT Solutions for Class 8 Science Microorganisms MCQs

Question 11. Which of the following reproduces only inside a host cell?

  1. Bacteria
  2. Virus
  3. Amoeba
  4. Fungus

Answer: 2. Virus

Microorganisms Friend and Foe MCQ Class 8

Question 12. A disease in human beings caused by the virus is

  1. Typhoid
  2. Influenza
  3. Dysentery
  4. Cholera

Answer: 2. Influenza

Microorganisms: Friend and Foe MCQs with Solutions Class 8

Question 14. Polio and measles are examples of

  1. Viral Diseases
  2. Bacterial Diseases
  3. Protozoan Diseases
  4. Fungal Diseases

Answer: 1. Viral Diseases

Question 15. The spoiling of food is a change.

  1. Physical
  2. Chemical
  3. Natural
  4. Biogeochemical

Answer: 2. Chemical

Question 16. Which of the following does not fix atmospheric nitrogen?

  1. Nostoe
  2. Anabaena
  3. Rhizobium
  4. Amoeba

Answer: 4. Amoeba

NCERT Class 8 Science Chapter 1 Crop Management MCQs

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NCERT Class 8 Science Chapter 1 Crop Management Multiple Choice Questions

Question 1. The system of Irrigation, where water is supplied drop by drop near the roots of plants, is called

  1. Pulley system
  2. Drip system
  3. Sprinkler system
  4. Lever system

Answer: drip system

Question 2. Weeds are the

  1. Main crop plants
  2. Insects and pets
  3. Unwanted plants growing along the crop
  4. Chemical substance

Answer: Unwanted plants along the crop

NCERT Class 8 Science Chapter 1 Crop Management MCQs

Question 3. Given below are statements about the harmful effects of wood on crop plants.

  1. They interfere with harvesting.
  2. They help crop plants grow healthy.
  3. They compete with crop plants for water, nutrients, space, and light.
  4. They affect the plant growth

Answer: They interfere with harvesting.

NCERT Class 8 Science Chapter 1 Crop Production MCQs With Answers

Choose the correct combination of statements

  1. (1),  (3), and (4)
  2. Only (3)
  3. (3) and (4)
  4. (1), (2), and (4)

Answer: 1. (1),  (3), and (4)

Question 4. 2,4-D is a

  1. Pesticide
  2. Insecticide
  3. Fungicide
  4. Weedlcide

Answer: Weedicide

NCERT Class 8 Science Chapter 1 Crop Management Multiple Choice Questions

Question 5. The term used for the process of separation of grains from chaff is

  1. Sieving
  2. Winnowing
  3. Threshing
  4. Hand Picking

Answer: Threshing

NCERT Solutions for Crop Management MCQs Chapter 1

Question 6. Why are the grains dried in the Sun before storing them?

  1. To keep the grains warm
  2. To increase the size of the grains
  3. To prepare the grains for germination
  4. To reduce the moisture content of the grains

Answer: To reduce the moisture content of the grains

Question 7. How can food Items like milk, eggs, and meat be produced on a large scale?

  1. By doing animal husbandry
  2. By performing plant harvesting
  3. By providing food to the animals
  4. By storing grains in big godowns

Answer: By doing animal husbandry

CBSE Class 8 Science Chapter 1 Multiple Choice Questions

Question 8. Which of the following is not a Rabl crop?

  1. Linseed
  2. Pea
  3. Gram
  4. Groundnut

Answer: 4 Groundnut

Question 9. What tool should the farmer select to safeguard seeds from animal consumption while sowing?

  1. Seed drill as it coats a chemical above the seeds
  2. Traditional tool, as many seeds are sewn together
  3. Seed drill, as it covers the seeds with soil after sowing
  4. A conventional tool as seeds, passes through a funnel-shaped cube

Answer: 3 Seed drill as it covers the seeds with soil after sowing

Class 8 Science Chapter 1 Crop Management MCQs

Question 10. Which of the following statements is incorrect?

  1. Freshly harvested grains must be dried before storing.
  2. Organic fertiliser has a balance of all plant nutrients
  3. Weeding is the process of growing weeds
  4. The drip irrigation system is suitable for fruit plants

Answer: 3 Weeding is the process of growing weeds

NCERT Solutions For Class 8 Science Chapter 1 Crop Management MCQs

Question 11. What advantages can the farmer expect from transitioning to using manure after a prolonged period of using fertilisers on his land?

  1. It will improve the texture and water retention capacity of the soil.
  2. It will decrease the number of earthworms in the soil
  3. It will make the soil more compact to hold more water in the roots
  4. It will increase particular chemicals in the soil to increase the yield

Answer: 1. It will improve the texture and water retention capacity of soil.

Crop Management MCQs Class 8 NCERT

Question 12. Which of the following is not a traditional method of irrigation?

  1. Moat
  2. Chain pump
  3. Sprinkler system
  4. Dhekli

Answer: 3. Sprinkler system