How many chromosomes are there in a maize (corn) embryo cell nucleus as compared to a maize (corn) endosperm cell nucleus?
A) half as many
B) two-thirds as many
C) the same number
D) twice as many
Answer: B
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In what ways are oxidative phosphorylation and photophosphorylation similar?
A. The source of energy is highly reduced organic compounds B. Proton motive force is generated C. ATP synthase enzyme phosphorylates ADP to make ATP D. An electron transport chain is used E. Water is split to provide electrons
Male northern elephant seals compete with one another for territories along the beach. Males will defend these territories throughout the breeding season
The males that win the male–male competitions defend the "best" beaches, and will have access to mate with females that stay on the beach. Female northern elephant seals (Mirounga angustirostris) come up on a beach during breeding season. Different areas on the beach are defended by a single male; when females haul-out they join a group of females in one specific area on the beach. They disproportionately breed with the male that defends that area of the beach. At what point may intersexual selection occur in these elephant seals? A. when the female is swimming to the beach B. when the female lands on the beach and chooses her resting location C. when the male defends his group of females against a different male D. when the male mates with a female within his group E. when the female leaves the beach after mating with a male
In addition to being a group of gram-negative bacteria considered normal flora of the gastroin-testinal tract of humans and animals, which one of the following also contains agents of impor-tant diseases such as gastroenteritis and enteric fevers, urinary tract infections, and bacterial pneumonia?
a. Neisseriaceae b. Micrococcaceae c. Enterococcus d. Enterobacteriaceae
The diffusive movement of an individual atom or molecule is independent of the diffusive movements of any other atom or molecule in the system
a. True b. False