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.
B. ____III____ 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.
C. There is more solar energy available in the ____IV____, which contributes to higher productivity; this is turn might contribute indirectly to greater diversity.
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