In the equilibrium theory of island biogeography, variation in numbers of species on islands of different distances from the mainland is seen as a function of differences in:

A) immigration rates.
B) extinction rates.
C) neither of the above.


Ans: A) immigration rates.

Biology & Microbiology

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Which of the following has a coelom that is not completely lined with tissues derived from the mesoderm?

a. pseudocoelomate b. eucoelomate c. protostome d. acoelomate

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What will be an ideal response?

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A tetraploid plant species (with four identical sets of chromosomes) is probably the result of _________.

a. allopolyploidy b. hybridization and nondisjunction c. allopatric speciation d. autopolyploidy as well as hybridization and nondisjunction e. autopolyploidy

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