Which best describes biogeographic isolation

a. it always leads to the formation of new species.

b. it cannot lead to evolution.

c. it is a mechanism for evolution.

d. it occurs only through geographic forces.

(options)

your a sped   no one cares

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.