The Living World NEET Biology Questions with Answers

The living world encompasses all living organisms, from the tiniest bacteria to the largest mammals. It includes a vast diversity of life forms found in different habitats such as forests, oceans, deserts and even the polar regions. These organisms are classified into various groups based on their similarities and differences. Classification helps in organizing the immense variety of life and understanding the evolutionary relationships between different species. For NEET students, understanding the living world is fundamental as it forms the basis for studying more complex biological concepts.

Organisms exhibit a wide range of characteristics such as growth, reproduction, responsiveness to stimuli, metabolism and homeostasis. These features distinguish living beings from non-living matter. The study of the living world also involves understanding ecosystems, biodiversity and the interdependence of organisms. NEET students must grasp these concepts to appreciate the complexity and beauty of life on Earth. Knowledge of the living world is important for further studies in biology, medicine and environmental science.

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The Living World NEET MCQs

Q1. The characteristics of growth include

A) increase in mass

B) increase in number of individuals

C) Both (a) and (b)

D) ability to reproduce

Answer. C

Q2. Plants grow throughout life by which method?

A) Cell dedifferentiation

B) Cell differentiation

C) Cell division

D) None of the above

Answer. C

Q3. In majority of higher animals and plants, reproduction and growth are

A) mutually exclusive events

B) synonymous events

C) synonymous events during in vitro culture

D) None of the above

Answer. A

Explanation: (a) In majority of the higher organisms (plants and animals), reproduction and growth are mutually exclusive events as increase in the body size of living beings do not alter the rate of reproduction or vice-versa.

Q4. Among the following, which is a common phenomenon exhibited by living and non-living organisms to show the feature of growth?

A) Increase in mass

B) Cell division

C) Increase in replication rate

D) Cell differentiation

Answer. A

Explanation: (a) Increase in the body mass is a common feature of non-living and living objects to represent growth.

Q5. What kind of growth is exhibited by non-living organisms?

A) Accumulation of material on surface

B) Accumulation of material inside

C) Growth from inside

D) None of the above

Answer. A

Explanation: (a) Non-living objects like mountains, boulders and sand mounds grow by accumulation of material on their surface.
However, in living organisms, growth is from inside (i.e. cell division in the body).

Q6. A true regeneration was observed in

A) Hydra

B) Planaria

C) Sponges

D) Amoeba

Answer. B

Explanation: (b) Planaria shows true regeneration in which Planaria regenerates the lost part of its body and becomes, a new organism.

Q7. Reproduction is synonymous with growth in which of the following set of organisms?

A) Bacteria, unicellular algae and Amoeba

B) Bacteria, Amoeba and fungi

C) Unicellular algae and fungi

D) Unicellular algae and filamentous algae

Answer. A

Explanation: (a) In unicellular organisms like bacteria, algae (unicellular) and Amoeba, reproduction involves increase in number of cells and thus, it is synonymous with growth.

Q8. Why reproduction cannot be considered as an inclusive defining characteristic of all living organisms?

A) Non-living organisms also reproduce

B) Many living organisms are sterile

C) Reproduction is synonym to growth in all organisms

D) Both (a) and (b)

Answer. B

Explanation: (b) Reproduction cannot be considered as an inclusive defining characteristic of life as many living organisms are sterile, i.e. they do not reproduce, c.g. mules, worker bee, etc.

Q9. Higher level of organisation emerges from

A) a tissue itself

B) interactions among organelles

C) molecular constituent of an organelle

D) None of the above

Answer. B

Explanation: (b) A higher level of organisation emerges due to the interactions among various organelles and their constituents. A molecular constituent, a tissue or an organelle itself does not play a significant role in hierarchical organisation unless there is no interaction among them.

Q10. In which of the following, metabolic reactions take place?

A) In living organisms only

B) Both in living and non-living organisms

C) In cell-free systems

D) Both (a) and (c)

Answer. D

Explanation: (d) Metabolic reactions occur in living organisms and can also be performed outside the body in a cell free system, e.g. isolated metabolic reactions can be carried out in in vitro conditions also.

Q11. Which of the following characteristics is not a defining character of living organisms?

A) Growth

B) Growth and reproduction

C) Reproauction

D) Growth and metabolism

Answer. B

Explanation: (b) Both growth and reproduction are not the defining characteristics of living organisms. Growth is exhibited by non-living matter in terms of increase in mass due to the accumulation of material. Similarly, reproduction is not exhibited by all living organisms and is not essential for the survival of an individual.

Q12. Metabolism can be best defined as

A) the process in which a chemical is formed inside the body

B) the process in which a chemical is destroyed inside the body

C) the sum total of all chemical reactions occurring in the body

D) a complex construction process only

Answer. C

Explanation: (c) Metabolism is the sum total of all the metabolic activities (chemical reactions) occurring in the body, i.e. anabolism and catabolism. Anabolism is a constructive process, while catabolism is a destructive process.

Enhance your preparation with Arexiq’s Mock Test Series where we provide solutions to various MCQs like we provide in this post “The Living World NEET MCQs”. Our expert teachers explain the concepts thoroughly, making it easy for you to understand. We offer many types of questions ensuring a clear grasp of concepts.

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FAQs about The Living World

What is the significance of classification in the living world?

Answer. Classification helps organize the diversity of life, making it easier to study and understand evolutionary relationships among different species.

2. What are the basic characteristics of living organisms?
Answer. Basic characteristics include growth, reproduction, responsiveness to stimuli, metabolism and homeostasis.

3. Why is biodiversity important in the living world?

Answer. Biodiversity ensures the stability and resilience of ecosystems, provides a source of food and medicine, and maintains ecological balance.

4. How do organisms interact within an ecosystem?

Answer. Organisms interact through various relationships such as predation, competition, symbiosis, and mutualism, which help maintain ecological balance.

5. What is the role of metabolism in living organisms?

Answer. Metabolism involves all the chemical reactions that occur within an organism to maintain life, including processes like respiration, digestion and excretion.