Humans with mutations in the AQP1 (aquaporin-1) gene do not produce the AQP1 protein. The absence of AQP1
causes an inability to ____ in these individuals.
a. produce concentrated urine
b. recognize thirst
c. make large volumes of dilute urine
d. control sweating
e. salivate
ANSWER: a
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Bacteriophage ? inserts into a bacterial chromosome using which of the following?
A. Nucleotide excision repair B. Endonuclease activity C. Site-specific recombination D. DNA gap repair
The most likely result of inhibiting the transport of
potassium into the guard cells is that Chapter 29 Plant Nutrition and Transport 313 a. the stomata will not be able to close. b. water will flow into the cells more freely. c. the stomata will close. d. the rate of photosynthesis will accelerate. e. the production of oxygen will increase.
Why is a species that has few individuals at greater risk of extinction than a species with a large population size?
A) A species with few individuals is more likely to be eliminated by a reduction in population size caused by a chance environmental event like bad weather or a fire. B) There's no risk to a small population as long as genetic diversity is high. C) A species with few individuals is likely to have a high percentage of heterozygotes. This can reduce the likelihood that the species can adaptively evolve in response to environmental changes. D) Genetic drift allows small populations to avoid the loss of advantageous alleles from the population.
Nutrients cycle most rapidly with the reservoir pool of a biogeochemical cycle and least rapidly with the biomass pool
Indicate whether the statement is true or false