Given below are three statements (I-III) each with one or two blanks. Select the option, which correctly fill up to blanks. Ecologists and evolutionary biologists have proposed various hypotheses; some important ones are
(I). Speciation is generally a function of time, unlike ...A... regions subjected to frequent glaciations in the past. ...B... have remained relatively undisturbed for millions of years and thus, had a long evolutionary time for species diversification.
(II). ...C... environments, unlike temperate ones, are less seasonal, relatively more constant and predictable.
Such constant environments promote niche specialization and lead to a greater species diversity.
(III). There is more solar energy available in the ...D..., which contributes to higher productivity; this in turn might contribute indirectly to greater diversity.
Choose the correct option for A, B, C and D.
Text Solution
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(d ) ( I). Speciation is a function of time; temperate regions were affected by glaciations , while tropical latitudes remained stable for long
(II). Tropical environments are less seasonal and more stable than temperate ones
(III.) More solar energy is available in the tropics, leading to higher productivity and diversity
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