Life history patterns of guppies in Trinidad are a result of which natural selection force?
a. Competition differences in different streams.
b. Predation differences in different streams.
c. Temperature differences in different streams.
d. Pollution differences in different streams.
e. Salt concentration differences in different streams.
B
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Calculate the minimum number of nucleotide triphosphate molecules that are hydrolyzed in the synthesis of a 200-amino-acid bacterial protein and list the stages of translation responsible for the hydrolysis
What will be an ideal response?
The rickettsial parasite Wolbachia pipientis can
A. enhance the life-span of an infected wasp. B. sometimes alter the sex of an infected wasp. C. confer toxicity to the sting of an infected wasp. D. None of the choices are correct.
What reproductive behavior do meiofauna exhibit to improve success of offspring? a. The production of plankton larvae
b. Having large eggs. c. A single egg at a time is raised. d. Exhibiting brooding protection.
Genomic imprinting works by
A. blocking the cell's ability to read certain genes. B. activating the DNA polymerases so thymine is more readily attached to the lead gene. C. blocking the cell's ability to undergo cytokinesis. D. activating the DNA ligases so they can clip the attached methyl groups off.