Chapter 24

Question 1

Which species concept works well for fossils?

Accepted Answer

Morphological

Question 2

Prezygotic barriers occur:

Accepted Answer

Before fertilization

Question 3

What organism is an example of reduced hybrid fertility?

Accepted Answer

Mule

Question 4

An example of temporal isolation is:

Accepted Answer

Mating at different times

Question 5

Sunflower hybrid isolation involves:

Accepted Answer

26 chromosome segments

Question 6

Which species concept defines species by ecological role?

Accepted Answer

Ecological

Question 7

Why are hybrid zones narrow?

Accepted Answer

Selection against hybrids

Question 8

A hybrid zone is a region where:

Accepted Answer

Species interbreed

Question 9

Fusion of species occurs when:

Accepted Answer

Hybrids are frequent

Question 10

What did Darwin refer to as the 'mystery of mysteries'?

Accepted Answer

The process of speciation

Question 11

Hybrid zones can shift due to:

Accepted Answer

Climate change

Question 12

Speciation and extinction together result in:

Accepted Answer

Macroevolution

Question 13

What does speciation explain in evolutionary biology?

Accepted Answer

Both diversity and unity of life

Question 14

Fruit fly hybrid sterility involves how many loci?

Accepted Answer

4 or more

Question 15

Which term describes small-scale changes in allele frequencies?

Accepted Answer

Microevolution

Question 16

Which is NOT a cause of sympatric speciation?

Accepted Answer

Gene flow

Question 17

Stability in hybrid zones means:

Accepted Answer

Hybrids persist over time

Question 18

Speciation serves as a bridge between:

Accepted Answer

Microevolution and macroevolution

Question 19

Hybrid sunflower speciation occurred in how many generations?

Accepted Answer

5

Question 20

What is an example of a postzygotic barrier?

Accepted Answer

Hybrid breakdown

Question 21

Gene flow acts as:

Accepted Answer

Genetic glue

Question 22

The biological species concept defines a species based on:

Accepted Answer

Reproductive isolation

Question 23

Pollinator behavior was affected by gene change in:

Accepted Answer

Mimulus flowers

Question 24

What model shows rapid speciation in fossils?

Accepted Answer

Punctuated equilibrium

Question 25

A single gene affecting speciation was observed in:

Accepted Answer

Snails

Question 26

How long does speciation take on average?

Accepted Answer

6.5 million years

Question 27

Which plant is an example of allopolyploid speciation?

Accepted Answer

Tragopogon

Question 28

Bombina toads form hybrids with:

Accepted Answer

Developmental problems

Question 29

Apple maggot fly speciation was driven by:

Accepted Answer

Habitat differentiation

Question 30

Hybrid breakdown occurs when:

Accepted Answer

Hybrid offspring are weak

Question 31

Allopatric speciation requires:

Accepted Answer

Geographic isolation

Question 32

Which concept does NOT apply to asexual organisms?

Accepted Answer

Biological species

Question 33

Which bird observed by Darwin is flightless?

Accepted Answer

Cormorant

Question 34

What is a classic lab example of allopatric speciation?

Accepted Answer

Drosophila on different diets

Question 35

Female mate choice in cichlids is influenced by:

Accepted Answer

Color

Question 36

Which type of speciation involves polyploidy?

Accepted Answer

Sympatric

Question 37

In mosquitoes, hybridization led to:

Accepted Answer

Insecticide resistance

Question 38

Gametic isolation prevents:

Accepted Answer

Gamete fusion

Question 39

Which process consistently leads to adaptive evolution?

Accepted Answer

Natural selection

Question 40

Which is an outcome of hybrid zones?

Accepted Answer

Reinforcement

Chapter 24

Questions 40

Chapter 24

Questions 40