The Calvin cycle of a plant exposed to light during the day that is suddenly put in the dark
A. cannot run, as it requires light energy directly.
B. can still run as long as there is ATP, CO2, and NADPH present.
C. runs in a different place in the plant.
D. uses a different source of carbon.
B. can still run as long as there is ATP, CO2, and NADPH present.
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How do buffers minimize change in the pH of biological systems?
A. By donating H+ ions when there is a shortage B. By absorbing H+ ions when there is an excess C. Both of these D. Neither of these
Diversity indices such as the Shannon diversity index are very valuable to
A. agricultural economists who study crop production. B. researchers calculating evapotranspiration rates. C. the formation of climax communities. D. conservation biologists who study rare species. E. scientists studying microbial diversity.
In a mycorrhizal association, the fungus benefits mainly by ____
a. absorbing water from the plant b. using the plant roots as a growth surface c. absorbing mineral ions from the plant d. providing water to the plant e. absorbing carbohydrates from the plant
Answer the following statements true (T) or false (F)
1. When autocrine stimulation is occurring, cancer cells divide in response to growth signals produced by the surrounding noncancerous cells 2. Genomic instability in cancer cells includes both nucleotide mutations and chromosomal aberrations. 3. If cancer does not develop within one year following exposure to a mutagen, then the mutagen did not cause DNA damage. 4.If a female is heterozygous for a mutant allele of a tumor-suppressor gene, her children will be predisposed to develop cancer only if their father is also a carrier. 5. This population is in Hardy-Weinberg equilibrium.