The continued geographic isolation of Kaibab squirrels from Abert squirrels has allowed the animals to evolve into

two distinct subspecies. This is an example of:
a. hybridization.
b. allopolyploidy.
c. adaptive radiation.
d. allopatric speciation.
e. sympatric speciation.


d

Biology & Microbiology

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Long-period comets are believed to originate in the ____________

Fill in the blank(s) with correct word

Biology & Microbiology

Which cellular structure makes sugars and proteins in plants?

a. Vacuole b. Centriole c. Nucleus d. Golgi body e. Chloroplast

Biology & Microbiology

Which of the following traits is not characteristic of amphibians?

a. carnivorous as adults b. four-chambered heart c. needing water to breed d. evolved from lobe-finned fish

Biology & Microbiology

During anaphase I of meiosis 

A. crossing-over occurs. B. homologous chromosomes pair up. C. mutations are common. D. segregation of alleles occurs.

Biology & Microbiology