Which of the following provides for instant reproductive isolation?

Which of the following provides for instant reproductive isolation?


a. polyploidy


b. most geographic barriers such as rivers and mountain belts


c. climate changes


d. behavior changes in females of the speciesWhich of the following provides for instant reproductive isolation?
lol...you just asked this question but here we go again...the most INSTANT reproductive isolation comes when you can't physically get to your mate, this will make it hard for the two of you to reproduce...hope this helps :-D





Sidebar: Polyploidy occurs in some animals, such as goldfish, salmon, and salamanders, but is especially common among ferns and flowering plants (see Hibiscus Rosa-Sinensis), including both wild and cultivated species. So the other responders are wrong polyploidy does not prevent ALL organisms from reproducing. Polyploidism is a mechanism of speciation not reproductive isolation. The answer is B.Which of the following provides for instant reproductive isolation?
a. polyploidy


http://en.wikipedia.org/wiki/Polyploidy





EDIT:


This is in response to another person on here: I'm not really sure whether your question is asking for Instant GENETIC reproductive isolation or PHYSICAL reproductive isolation. Speciation is caused by GENETIC reproductive isolation, so me and the guy below me may not necessarily be incorrect. If the question is calling for instant GENETIC reproductive isolation, the answer is (a). New plant species have been formed ';INSTANTLY'; via polyploidy. (b), (c) take a LONG period of time for speciation to occur. And (d) is incorrect because behavior changes don't affect the females genes, but rather, a potential mates opportunity to mate with the female. As you can see, this isn't INSTANT REPRODUCTIVE ISOLOATION. So, while polyploidy may not create new species spontaneously in all organisms, it is the best answer.
a.





Offspring would not be able to breed with other members of it species.