In studies designed to determine the origin of HIV, how did the researchers first know that Marilyn the chimp may be infected with HIV?
A. She had been used in HIV research.
B. She had tested positive for antibodies against HIV.
C. She had HIV DNA in her tissues.
D. She had symptoms of HIV infection, or AIDS.
E. She had HIV RNA in her blood.
B. She had tested positive for antibodies against HIV.
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A symbiotic relationship where one organism lives inside another species is called _______
A. cytoplasmic inheritance B. heteroplasmy C. paternal leakage D. endosymbiosis
Peptide bonds form between
A. two amino groups. B. two carboxyl groups. C. one carboxyl group and one R group. D. one amino group and one carboxyl group. E. one R group and one amino group.
A biodiversity hotspot is a(n):
a. protected area with few humans present. b. type of island from which humans are leaving. c. an area rich in endemic species and high in human population. d. a type of corridor to which humans are rapidly migrating. e. an area poor in endemic species in a tropical location
Non-nitrogen-fixing bacteria bring in ammonia and use it for anabolic pathways by incorporating it into
a. glutamate. b. glutamine. c. oxaloacetate. d. both glutamate and glutamine.