What does the nucleolus, within the nucleus, synthesize?
a. DNA
b. genes
c. hormones
d. ribosomal RNA
e. messenger RNA
d
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Which of the following diseases affect DNA repair?
A. Alzheimer's disease B. diabetes C. xeroderma pigmentosum D. diabetes and xeroderma pigmentosum E. Alzheimer's disease and diabetes
In regards to altruism, what way are humans like vampire bats?
A. Their altruism is based on haplodiploidy. B. They are both Chiroptera. C. Their altruism is based on kin selection. D. They engage in reciprocal altruism. Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about altruism? What other information is related to the question? Choose Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection on Process: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which statement best describes the mechanism of neutralization?
A) Antigens clump together and are more susceptible to phagocytosis. B) Cells are neutralized by toxins injected by natural killer cells. C) It causes pathogenic cells to lyse. D) An antibody blocks an antigen's activity by binding to it. E) Pathogens are bound by antibodies and are more susceptible to phagocytosis
Fungi are found associated with the earliest plant fossils. Fungi may have helped plants become terrestrial by
A) forming associations to obtain water and minerals. B) stocking the soil with organic matter. C) providing simple organic compounds in return for sugars. D) killing the bacterial enemies of plants.