The population of American bison used to number in the millions. Hunting and other problems greatly decreased the number of bison to about 1,000. Today, the numbers are recovering to estimates of more than 200,000 bison. This crash in the population of bison and recent recovery is an example of ______
A. gene flow
B. genetic drift
C. the bottleneck effect
D. the founder effect
C. the bottleneck effect
Biology & Microbiology
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The sipunculid worms are also called:
a. peanut worms. b. lugworms. c. innkeeper worms. d. fanworms. e. beardworms.
Biology & Microbiology
In vertebrates, most of the fluid that ultimately exits the body as urine first enters the nephron tubules by the process of ____________.
A. absorption B. excretion C. filtration D. reabsorption E. secretion
Biology & Microbiology
Small molecules that bind directly to mRNAs and effect transcription or translation are binding to regions of the mRNA known as
A) Shine–Dalgarno sequences. B) operator regions. C) riboswitches. D) ribozymes. E) allosteric sites.
Biology & Microbiology
Fermentation occurs if ________.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology