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Stearns & Hoekstra: Evolution 2e

Chapter 12


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Question 01

Are species natural units, into which organisms can be classified unambiguously?

Question 02

What is the decisive criterion according to the biological species concept (BSC)?

Question 03

Which one of the following phenomena is problematic for the BSC?

Question 04

The problem posed to the BSC by asexuality does not apply to bacteria, in which genetic exchange is possible by parasexual processes. True or false?

Question 05

What are cryptic species?

Question 06

A problem with the phylogenetic species concept (PSC) is that:

Question 07

A possible reconciliation of different species concepts is by recognizing that:

Question 08

Which mechanisms are responsible for speciation?

Question 09

The famous Darwin's finches on the Galapagos islands form a typical example of which type of speciation?

Question 10

What is competitive speciation?

Question 11

There are hundreds of species of fig wasps, each breeding on its own species of fig. What type of speciation is most likely at the basis of this pattern?

Question 12

Speciation is always a gradual process that takes very long periods of time. True or false?

Question 13

What is the effect of secondary reinforcement of reproductive isolation?

Question 14

Secondary reinforcement is very important in causing reproductive isolation in hybrid zones. True or false?

Question 15

What is the potential role of sexual selection in speciation?