Genetics as it applies to evolution, molecular biology, and medical aspects.

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Post by biohelp22 » Sun Apr 23, 2006 3:21 pm

i think i understand this question better than others

the process according to which eventually there are barriers to successful imbreeding between two species with separate geographic ranges is called

a. sympatric speciation
b. allopatric speciation
c. adaptive radiation
d. polyploid speciation
e. exaptation

im thinking a, just because it makes sense in myhead hehe

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Post by risingstar5 » Sun Apr 23, 2006 5:39 pm

its either a or b... but i could use some confirmation on that too!
Never let the odds keep you from pursuing what you know in your heart you were meant to do. <3

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Post by d00d » Sun Apr 23, 2006 5:46 pm

it's B - allopatric speciation occurs due to geograhpical isolation (barriers) like
the speciation of tilapia fish in lake turkana in kenya due to the lake drying up and separating the original group into three.

A is speciation between two groups in the same environment due to behavioural habits (one nocturnal and one diurnal), non-matching position of genetalia for reproduction (like a chihhuahua with a great dane) or formation of sterile hybrids (mule from a donkey and a horse)

i don't know about E. D might deal with mutations. but C is the process by which one species evolves into different varieties to take advantage of other available niches in it's habitat (or something like that)
for example, darwin's finches in the galapagos islands.

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