Major Abiotic Factors MCQs and Answers

Are you looking for Major Abiotic Factors MCQs and Answers for medical entrance examinations? If yes, these are some most important multiple choice questions and answers on NCERT Class-12 Biology, Chapter-13 (Organisms and Populations).

Here we composed these Major Abiotic Factors MCQs and Answers after reading the chapter on Organisms and Populations from the NCERT book on Class 12 Biology. The questions are topics-wise and the students can relate the questions easily to the most important topics of this chapter.

Major Abiotic Factors MCQs and Answers

1. Which of the following is known as an edaphic abiotic factor?

a) Light

b) Soil

c) Air

d) Water

Answer: b


2. Which of the following is known as a topographic abiotic factor?

a) Earth’s surface

b) Wind

c) Temperature

d) Humidity

Answer: a


3. What is the temperature at hydrothermal sea vents?

a) 50°C

b) 110°C

c) 25°C

d) 0°C

Answer: b


4. Which animal is not found in the forests of Kerala?

a) Cow

b) Bats

c) Cat

d) Snow leopard

Answer: d


5. Which one of the following is an abiotic factor?

a) Animals

b) Plants

c) Humidity

d) Fungi

Answer: c


6. What are plants growing at high temperatures alternatively called?

a) Mesotherms

b) Megatherms

c) Microtherms

d) Conifers

Answer: b


7. What are plants growing in high-low temperature called?

a) Microaerophils

b) Megatherms

c) Microtherms

d) Mesotherms

Answer: d


8. What are plants growing at low temperatures called?

a) Mesotherms

b) Megatherms

c) Microtherms

d) Shrubs

Answer: c


9. What are plants growing at very low temperatures called?

a) Mesotherms

b) Microtherms

c) Megatherms

d) Hekistotherms

Answer: d


10. What are warm-blooded animals called?

a) Tropical

b) Mesotherms

c) Homeotherms

d) Euryhaline

Answer: c


11. What are cold-blooded animals called?

a) Homeotherms

b) Poikilotherms

c) Littoral

d) Stenohaline

Answer: b


12. Which is a universal solvent?

a) Alcohol

b) Ether

c) Water

d) Benzene

Answer: c


13. What are plants growing in an aquatic environment called?

a) Mesotherms

b) Hydrophytes

c) Tropical

d) Microtherms

Answer: b


14. Which one of the following is a problem for aquatic animals?

a) Wind

b) Precipitation

c) Humidity

d) Endo osmosis

Answer: d


15. Organisms that can tolerate a wide range of salinities are called?

a) Euryhaline

b) Mesotherms

c) Temperate

d) Stenohaline

Answer: a


16. Light is important for which of the following functions?

a) Reproduction

b) Photosynthesis

c) Solvent

d) Support

Answer: b


17. Water is important for which of the following functions?

a) Universal solvent

b) Support

c) Reproduction

d) Development

Answer: a


18. Temperature is important for which of the following functions?

a) Solvent

b) Metabolic activities

c) Photosynthesis

d) Support

Answer: b


19. Which one of the following is an abiotic factor?

a) Plants

b) Animals

c) Protists

d) Wind

Answer: d


20. Which one of the following is an abiotic factor?

a) Dogs

b) Grass

c) Soil

d) Insects

Answer: c


21. Which of the following organism requires high humidity for growth?

a) Mango

b) Orchids

c) Grasses

d) Lizards

Answer: b


22. The plants growing at high humidity are called?

a) Halophytes

b) Benthic

c) Homeotherms

d) Hygrophytes

Answer: d


23. What is humidity?

a) Temperature

b) Wind

c) Invisible vapours in the atmosphere

d) Motion in air

Answer: c


24. What is wind?

a) Sunlight

b) Invisible vapours in the atmosphere

c) Supporting material

d) Motion in air

Answer: d


25. What does good soil provide?

a) Distortion

b) Speed

c) Minerals

d) Reproduction capacity

Answer: c


26. Which of the following instrument is used to measure the speed of the wind?

a) Thermometer

b) Anemometer

c) Barometer

d) Voltmeter

Answer: b


27. Which of the following is the component of good soil?

a) Microflora

b) Sand

c) Humus

d) Fauna

Answer: c


28. In which zone of the lake does the light cannot penetrate?

a) Littoral

b) Limnetic

c) Photic

d) Benthic

Answer: d


29. Which region is present below the photic region?

a) Littoral

b) Limnetic

c) Benthic

d) Aphotic

Answer: d


30. Which one of the following is the effect of the wind?

a) Uprooting of plants

b) Change in temperature

c) Decrease in pH

d) Decrease in water

Answer: a


31. Clay < Silt < ? < Coarse < Gravel

Which type is missing in the sequence of increasing particle size of soil?

a) Stone

b) Rock

c) Fine Sand

d) Humus

Answer: c


FAQs on Major Abiotic Factors

Q1. What are abiotic factors?

Answer: Abiotic factors are non-living chemical and physical elements in the environment that affect the ability of organisms to survive and reproduce. They include things like temperature, sunlight, water, and soil.

Q2. What role do abiotic factors play in ecosystems?

Answer: Abiotic factors play a vital role in ecosystems by shaping the environment and determining which organisms can live there. They also affect the food chain by influencing the availability of resources like food and shelter.

Q3. How do abiotic factors affect organisms?

Answer: Abiotic factors can affect organisms in many ways. For example, they can determine the climate of an area, which can in turn affect the types of plants and animals that can live there. They can also affect the availability of food and water, which can impact an organism’s growth and reproduction.

Q4. What are some of the major abiotic factors?

Answer: Some of the major abiotic factors include temperature, light, water, and soil. These factors can vary widely from one ecosystem to another, and they can have a big impact on the types of organisms that can live there. Temperature, light, water, and soil are the major abiotic factors. These factors can vary widely from one ecosystem to another, and they can have a big impact on the types of organisms that can live there.

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