Chapter 27.5 Speciation

Question 1

Define Species

Answer 1

a group of organisms that are capable of interbreeding and are isolated reproductively from other species.

Question 2

Who proposed the biological species concept?

Answer 2

Ernst Mayr (1940)

Question 3

What is speciation?

Answer 3

The process by which one species splits into two or more daughter species, often gradually.

Question 4

What is Reproductive isolation?

Answer 4

individuals of a population only mate with each other

• Don’t mate with individuals in other populations
• Become a distinct evolutionary unit
• Gene flow is cut off, each adapts to local conditions

Question 5

When are two populations considered separate species?

1. When they look different
2. When they live in different places
3. When they no longer produce fertile offspring together

Answer 5

3. When they no longer produce fertile offspring together