Home Biology Biodiversity and Conservation Statement Based Questions Given below are three statements (A-C) each …
Biology Biodiversity and Conservation Statement Based Questions Single Correct MCQ
Published on: August 13, 2026

Given below are three statements (A-C) each with one or two blanks. Select the option which correctly fills up the blanks.

Statements:

Ecologists and evolutionary biologists have proposed various hypotheses; some important ones are

A
. Speciation is generally a function of time I regions were subjected to frequent glaciations in the past, II have remained relatively undisturbed for millions of years and thus, had a long evolutionary time for species diversification. I - temperate, II - tropical latitudes, IN - tropical, N - tropics
B
. ___III environments, unlike temperate ones, are less seasonal, relatively more constant and predictable. Such constant environments promote niche specie station and lead to a greater species diversity. I-tropical, II-tropical latitudes, III-temperate, IV-Savannah
C
. There is more solar energy available in the IV which contributes to higher productivity; this in turn might contribute indirectly to greater diversity. Options: I - tropics, II - tropical latitudes, III - temperate, IV -Arctic Tundra
D
I - temperate, II - tropical latitudes, III - tropics, IV – Chaparral

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Text Solution

Verified by Experts
The correct answer is:
A

Statement A (Time Hypothesis): Speciation is a function of time. Unlike I - temperate regions, which were subjected to frequent glaciations in the past (wiping out existing species), II - tropical latitudes remained relatively undisturbed for millions of years, allowing a longer time for species diversification.

Statement B (Stability Hypothesis): III - Tropical environments are less seasonal, more constant, and more predictable than temperate ones. This stability promotes niche specialization, leading to greater species diversity.

Statement C (Energy Hypothesis): There is more solar energy available in the IV - tropics, which leads to higher productivity. This high productivity indirectly contributes to greater overall biodiversity.

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