Which of the following is the most prevalent immediate cause of extinction?

A) Environmental change
B) Specialization
C) Disease
D) Predation
E) Competition


A

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

What event occurs during ovulation?

Biology & Microbiology

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.

Biology & Microbiology