Question

The theory of natural selection is based on
I. Random mating
II. Limited environmental resources
III. Stable genotype frequencies over time

• A. I only
• B. II only
• C. III only
• D. I and II
• E. II and III

Answer 1

Answer: (B)

II only

The theory of natural selection is based on limited environmental resources.

according to Darwin's Theory of Evolution by Natural Selection, more individuals are produced each generation that can survive. Phenotypic variation exists among individuals and the variation is heritable. Those individuals with heritable traits better suited to the environment will survive.

Darwin's Theory of Evolution by Natural Selection:

• More individuals are produced each generation that can survive.
  
• Phenotypic variation exists among individuals and the variation is heritable.
  
• Those individuals with heritable traits better suited to the environment will survive.
  
• When reproductive isolation occurs new species will form.
  

Natural selection acts to preserve and accumulate minor advantageous genetic mutations.