What did Darwin suggest the driving force of evolution was? a. ...

[notis]

What did Darwin suggest the driving force of evolution was?
  a. Reproduction
  b. Small genetic variation
  c. Isolation
  d. Large population size

Question 2

What layer is permanently devoid of light?
  a. Photic zone
  b. Euphotic zone
  c. Disphotic zone
  d. Aphotic zone

[kusterl]

Answer to Question 1

ANS: C
Charles Darwin thought isolation was a key factor in evolution. He observed various finch populations
on separate islands in the Galapagos. He also realized the smaller the reproducing population was, the
faster evolutionary change would occur. Information can be found in the section Understanding the
Ocean Began with Voyaging for Trade and Exploration

Answer to Question 2

ANS: D
The aphotic zone receives no sunlight. It extends from below the photic zone to the seabed. Animals
have developed other means of getting nutrients without the ready availability of photosynthetic
organisms. Information can be found in the section Marine Life Success Depends upon Physical and
Biological Environmental Factors

[notis]

TYSM

[recede]

Excellent