Which of the following explains why the human population has so many phenotypic differences?
A. The majority of our genome consists of
noncoding DNA.
B. The majority of our genome consists of
DNA that codes for proteins.
C. Recombination allows for new genetic
combinations.
D. The genes that code for what we look like
are more susceptible to mutation than other
genes.
E. None of the answer options is correct.
C
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Which letter in the figure above corresponds to closed sodium and potassium channels?
A) A B) B C) C D) D E) E
What is the difference between a parasite and a parasitoid?
A) A parasite is larger. B) A parasitoid is harmless to the host. C) A parasite has only one host. D) A parasitoid typically always kill its host.
The energy from catabolic reactions is used to produce
a) ADP. b) ATP. c) AMP. d) phosphate.
Answer the following questions true (T) or false (F)
1. Commensalism often results in competitive exclusion. 2. Organisms in communities may be important factors in the evolution/adaptation of other organisms in the community. 3. Climax communities in succession are those that persist for long periods of time.