Microbes such as Lactobacillus acidophilus colonize the human vagina by fermenting ________.
A. sucrose
B. lactose
C. glycogen
D. glucose
Answer: C
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GGG and GGC are codons for the amino acid, glycine. A mutation caused the insertion of a cytosine in place of the guanine during DNA replication. Over many generations the DNA changes so that the frequency of GGC is similar to that of GGG. What is this phenomenon called?
A. directional selection
B. bottleneck effect
C. stabilizing selection
D. adaptive variation
E. neutral variation
Vinblastine, a chemotherapeutic drug used to treat breast and testicular cancers, interferes with the assembly of
microtubules. Speculate how this drug works to inhibit cancer cell growth.
a. Vinblastine inhibits transition from G1 to S. b. Vinblastine inhibits transition from S to G2. c. Vinblastine inhibits cytokinesis. d. Vinblastine disrupts mitotic spindle formation and consequently mitosis. e. Vinblastine inhibits cyclin production.
2nd law of thermodynamics
What will be an ideal response?
Describe the evolutionary relationships between the following organisms. Draw a family "tree" if necessary. Include
bony fish, amniotes, lizards, mammals, turtles, birds, reptiles, ray-finned fishes, amphibians, lungfish, and lobe-finned fishes. What will be an ideal response?