Question 1

A rainforest is a highly complex habitat, with organisms living at various levels in the trees, on the ground, and underground. Is it possible to consider two populations living in the same tree to be geographically isolated?

Accepted Answer

A)  No, because if they are in the same tree, they are in the same geographic area. 
B)  No, because if they are in the same square acre, they cannot be considered to be geographically isolated. 
C)  Yes, because they can still undergo sympatric speciation. 
D)  Yes, because there are so many habitats in one tree that the populations may never interact.

Question 2

The population of salamanders, a _______ species found along the Pacific coast of the United States, forms a circle around a desert-like valley. Neighboring salamander species mate, but those on opposite sides of the valley do not.

Accepted Answer

The answer of The population of salamanders, a _______ species...

Question 3

Which of the following is not true of adaptations?

Accepted Answer

A)  They are often complex. 
B)  They help organisms better match their environments. 
C)  They can occur quickly or slowly. 
D)  They lead to an organism becoming perfectly adapted.

Question 4

Examine the figure below. 
Why have the two plant populations depicted become so different in the time they were separated by the ocean?

Accepted Answer

A)  Founder's effect. a small group of individuals carrying only the tall allele established a new population on the right side of the ocean. 
B)  The amount of gene flow between the two populations increased when the ocean separated the plants so mutations moved from one population to another. 
C)  When sea level rose, it killed all of the plants on the right side of the figure. A new species evolved from another plant species already existing in the mountains of the right. 
D)  The separated populations adapted to the different environments on each side of the ocean and became reproductively isolated.

Question 5

A biological species is a group of interbreeding populations that is ________ isolated from other species of organisms living in the same region.

Accepted Answer

The answer of A biological species is a group of...

Question 6

Sympatric speciation always follows allopatric speciation.

Accepted Answer

A) True 
 B)False

Exam 18: Adaptation and Speciation

A rainforest is a highly complex habitat, with organisms living at various levels in the trees, on the ground, and underground. Is it possible to consider two populations living in the same tree to be geographically isolated?

The population of salamanders, a _______ species found along the Pacific coast of the United States, forms a circle around a desert-like valley. Neighboring salamander species mate, but those on opposite sides of the valley do not.

Which of the following is not true of adaptations?

Examine the figure below. Why have the two plant populations depicted become so different in the time they were separated by the ocean?

A biological species is a group of interbreeding populations that is ________ isolated from other species of organisms living in the same region.

Sympatric speciation always follows allopatric speciation.