SPECIATION CHAPTER 14: SPECIATION Total Points: 12 points Name Questions 1-3 are
ID: 267658 • Letter: S
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SPECIATION
CHAPTER 14: SPECIATION Total Points: 12 points Name Questions 1-3 are geographical patterns that induce speciation (allopatric, sympatric, and parapatric). Which term fits each description? 1.) A population of birds found in India become isolated into two populations once India slammed up against Asia and began to form the Himalayan Mountains. Term 2.) A single tree goes from being diploid to tetraploid and can no longer reproduce with its fellow trees that are right next to it, but it can reproduce with its own clones. Term: 3.) A population of sea gulls is found along the Arctic Circle. Some of the populations are capable of interbreeding with one another, but others are not. Term: 4.) What is the difference between a post-zygotic reproductive barrier and a pre-zygotic reproductive barrier? 5.) The rate of speciation has two general theories associated with it. Who came up with each of these theories and what was their evidence to support their theory? (4 Rts) A. Gradualism: a. Who: b. Evidence: B. Punctuated Equilibrium: a. Who: b. Evidence: 240 wordsExplanation / Answer
1. Allopatric speciation: Speciation due to geographical isolation.
2. Sympatric speciation: Speciation that occurs without geographic isolation
3. Sympatric speciation: Speciation that occurs without geographic isolation
4. The major difference between prezygotic and postzygotic isolation is that prezygotic isolation mechanisms prevent the fusion of gametes whereas post-zygotic isolation mechanisms prevent the production of fertile offspring.
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