Question 1

When the reproductive cells of different species are incompatible and cannot accomplish fertilization, it is referred to as:

Accepted Answer

A)  hybrid sterility. 
B)  gametic isolation. 
C)  gametic breakdown. 
D)  temporal isolation. 
E)  behavioral isolation.

Question 2

Temporal and habitat isolation is classified as what type of reproductive barrier?

Accepted Answer

A)  Gametic barriers 
B)  Prezygotic barriers 
C)  Postzygotic barriers 
D)  Homozygotic barriers 
E)  Heterozygotic barriers

Question 3

Alloploidy provides a mechanism for slow speciation.

Accepted Answer

A) True 
 B)False

Question 4

Polyploidy is much more common among which type of organism?

Accepted Answer

A)  Fungi 
B)  Plants 
C)  Primates 
D)  Humans 
E)  Bacteria

Question 5

Many new species of desert lizards have arisen from a nonnative population which was introduced into the American southwest. This example best describes:

Accepted Answer

A)  the effects of climatic change. 
B)  sympatric speciation. 
C)  allopatric speciation. 
D)  adaptive radiation. 
E)  microevolution.

Question 6

Wings on insects, flowers on plants, and feathers on birds are all examples of variations of some preexisting structures, otherwise known as:

Accepted Answer

A)  preadaptations. 
B)  allopolyploidy. 
C)  paedomorphosis. 
D)  allometric growth. 
E)  punctuated equilibrium.

Question 7

If a small population of mice colonizes a new area away from the range of the original species, the colony that is geographically isolated may eventually evolve into a new species. These events can be used to describe:

Accepted Answer

A)  hybridization. 
B)  allopolyploidy. 
C)  adaptive radiation. 
D)  allopatric speciation. 
E)  sympatric speciation.

Question 8

Differentiate between macroevolution, microevolution, and speciation.

Accepted Answer

The answer of Differentiate between macroevolution, microevolution, and speciation....

Question 9

The continued geographic isolation of Kaibab squirrels from Abert squirrels has allowed the animals to evolve into two distinct subspecies. This is an example of:

Accepted Answer

A)  hybridization. 
B)  allopolyploidy. 
C)  adaptive radiation. 
D)  allopatric speciation. 
E)  sympatric speciation.

Question 10

What type of organism possesses multiple sets of chromosomes from different species?

Accepted Answer

A)  A polygamete 
B)  An allopolyploid 
C)  An autopolyploid 
D)  A hybrid polyploid 
E)  A heterozygous polyploid

Question 11

Species whose ranges overlap, but do not interbreed because they are found in different environments or areas within the range, are said to exhibit:

Accepted Answer

A)  habitat isolation. 
B)  temporal isolation. 
C)  biological isolation. 
D)  evolutionary isolation. 
E)  environmental isolation.

Question 12

Which term describes new ecological opportunities that were not exploited by an ancestral organism?

Accepted Answer

A)  Hybrid zones 
B)  Fusion zones 
C)  Stability zones 
D)  Adaptive zones 
E)  Reinforcement zones

Exam 20: Speciation and Macroevolution