Chapter 14

Question 1

Macroevolution

Answer 1

Major changes in history of life

Question 2

Define Biological Species Concept

Answer 2

1. share common characteristics
2. “successful breeding” -> offspring are fertile
3. Reproductively Isolated -> 2 Populations can’t interbreed

Question 3

What are the two types of reproductive barriers

Answer 3

-Prezygotic barriers
-Postzygotic barriers

Question 4

Prezygotic barriers, give examples (Temporal)

Answer 4

• E. Spotted skunks breed in fall
• W. spotted skunks breed in winter

Question 5

Prezygotic barriers, give examples (Behavioral)

Answer 5

Behavioral:
- Elaborate courtship behaviors in birds
Mechanical:
- Can’t mate

Question 6

Postzygotic barriers, give examples

Answer 6

When different species mate, their offspring will be sterile
ex: horse x donkey = Mule (sterile = can’t make gametes)

Question 7

Artificial selection

Answer 7

Changes phenotype faster than natural selection but does not lead to reproductive isolation