When a population goes through a bottleneck, ____.
A. genetic drift is likely to occur
B. mutation rates increase
C. extinction rates decrease
D. natural selection decreases in intensity
E. inbreeding decreases
Answer: A
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Given the DNA template shown in the figure above, which of the following bases would you find in a complementary RNA strand and where would they be synthesized?
A) A-A-A-A-A; nucleus B) U-U-U-U-U; nucleus C) A-A-A-A-A; ribosome D) U-U-U-U-U; ribosome
The use of vaginal inserts of Lactobacillus to restore a healthy acidic environment is an example of ________.
A. probiotics B. riboswitches C. phytobiotics D. prebiotics E. lantibiotics
Which one of the following can create new alleles?
A) natural selection B) sexual reproduction C) mutation D) genetic drift
Which of the following activates the egg?
A. Fusion of sperm and egg membranes B. Fusion of sperm and egg nuclei C. Contact of sperm with the outside of the zona pellucida D. Entrance of sperm into the zona pellucida E. Contact of sperm with the vitelline envelope