Which of the following is the most prevalent immediate cause of extinction?
A) Environmental change
B) Specialization
C) Disease
D) Predation
E) Competition
A
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The development of penicillin-resistant bacteria in the 20th Century represents an example of
a. punctuated equilibrium b. speciation c. genetic drift d. microevolution e. mutation
A reason or reasons given by scientists as to why viruses are not considered living organisms include:
a. Viruses do not contain genetic information b. Viruses do not reproduce on their own c. Viruses are all smaller than the smallest known cells d. Viruses do not contain a nucleus e. Viruses can be frozen and still survive
What event occurs during ovulation?
Which observation(s) of the medium ground finch (Geospiza fortis) by Peter and Rosemary Grant verify Darwin's selection hypothesis? Check all that apply.
_____ Considerable variation existed in the beak size and shape of this finch. _____ The medium ground finch showed assortative mating according to beak size and shape. _____ Beak shape (depth) varied with the dryness of the year. _____ Offspring were similar to parents in beak size and shape.