The brain uses a lot of glucose. How does glucose pass through the blood-brain-barrier?
A. Glucose Channels
B. Simple Diffusion
C. Aquaporins
D. Transporters
Answer: D. Transporters
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In order to transfer all the genes to an F- cell we would need how long?
a. 1 minute b. 20 minutes c. 3 minutes d. 14 minutes e. 5 minutes
Hunters waiting to kill "prize bucks" over smaller white-tailed deer can possibly change allele frequencies of the deer population. If smaller deer are speared this could lead to
A. no adverse effects on the white-tailed deer species. B. a founder effect, from hunting, will allow small groups of larger white-tailed deer to establish habitats away from human populations. C. directional selection for smaller white-tailed deer will result in fewer "prize bucks." D. natural selection of deer with large antlers. E. a bottleneck effect, from hunting, that will cause extinction of the white-tailed deer.
Genetic change in bacteria is accomplished by which of the following?
A. Genetic recombination B. Gene exchange between bacteria C. Mutation D. All of the above are correct.
Which of the following genera fix nitrogen nonsymbiotically?
A. Rhizobium B. Nitrosomonas C. Azotobacter D. Nitrobacter