Species Concepts and Reproductive Barriers in Evolution

Question 1

What does the morphological species concept classify organisms based on?

Accepted Answer

Observable physical traits

Question 2

What does the ecological species concept define a species by?

Accepted Answer

Ecological niche

Question 3

How does the phylogenetic species concept define a species?

Accepted Answer

As the smallest group of individuals that share a common ancestor

Question 4

What do reproductive barriers serve to prevent?

Accepted Answer

Hybridization

Question 5

What are the two categories of reproductive barriers based on when they function?

Accepted Answer

Prezygotic and postzygotic

Question 6

What is the term for the lack of opportunity for mates to encounter each other?

Accepted Answer

Habitat isolation

Question 7

In which type of speciation does the initial block to gene flow come from a geographic barrier?

Accepted Answer

Allopatric speciation

Question 8

What is the term for a form of natural selection in which individuals with certain traits are more likely to obtain mates?

Accepted Answer

Sexual selection

Question 9

What happens in the fusion model of speciation?

Accepted Answer

The two hybridizing species fuse into one

Question 10

What is the term for regions in which members of different species meet and mate to produce hybrid offspring?

Accepted Answer

Hybrid zones