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Organism and Population MCQs for NEET — Botany Questions with Answers

Practice free Organism and Population (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

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NEET 2023

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Statement I: Gause's 'Competitive Exclusion Principle' states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually. Statement II: In general, carnivores are more adversely affected by competition than herbivores.

A. Both Statement I and Statement II are true. B. Both Statement I and Statement II are false. C. Statement I is correct but Statement II is false. D. Statement I is incorrect but Statement II is true.

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Explanation

Both true per NCERT (carnivores at higher trophic levels are more sensitive to competition).

NEET 2024

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The equation of Verhulst-Pearl logistic growth is $\dfrac{dN}{dt} = rN\left[\dfrac{K-N}{K}\right]$. From this equation, $K$ indicates:

A. Population density B. Intrinsic rate of natural increase C. Biotic potential D. Carrying capacity

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Explanation

$K$ is the carrying capacity; $r$ is the intrinsic rate of natural increase.

NEET 2025

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Epiphytes that are growing on a mango branch is an example of which of the following?

A. Commensalism B. Mutualism C. Predation D. Amensalism

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Explanation

An epiphyte benefits (support/space) while the mango tree is unaffected — this is commensalism (+/0).

NEET 2025

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Given below are two statements:

Statement I: Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it.

Statement II: Fig wasp and fig tree exhibit mutual relationship as fig wasp completes its life cycle in fig fruit and fig fruit gets pollinated by fig wasp.

In the light of the above statements, choose the most appropriate answer:

A. Both statement I and statement II are correct B. Both statement I and statement II are incorrect C. Statement I is correct but statement II is incorrect D. Statement I is incorrect but statement II is correct

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Explanation

Both statements are correct: the fig encloses wasps, and the fig–fig wasp pair is a classic example of obligate mutualism (the wasp completes its life cycle in the fig and pollinates it).

NEET 2025

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Which one of the following equations represents the Verhulst-Pearl Logistic Growth of population?

A. $\dfrac{dN}{dt} = r\left(\dfrac{K-N}{K}\right)$ B. $\dfrac{dN}{dt} = rN\left(\dfrac{K-N}{K}\right)$ C. $\dfrac{dN}{dt} = rN\left(\dfrac{N-K}{N}\right)$ D. $\dfrac{dN}{dt} = N\left(\dfrac{r-K}{K}\right)$

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Explanation

The Verhulst–Pearl logistic growth equation is $\dfrac{dN}{dt} = rN\left(\dfrac{K-N}{K}\right)$, where K is the carrying capacity.

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