The main function of bacterial endospores is:
A. Protection of bacteria against phagocytosis
B. Survival against environmental dangers
C. Induction of antibiotic resistance
D. Recognition of specific receptors on target cells
E. Reproduction
Ans: B. Survival against environmental dangers
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Which of the following is a cure for mumps?
A) a vaccine B) an antibiotic C) host antibodies D) an antiviral
Two organisms are very similar both in terms of molecular and physical characteristics
However, there is at least one characteristic that is not shared by these organisms—each organism has at least one evolutionary novelty that is not present in the other organism and thus these organisms do not interbreed. As a result, what is likely the lowest taxonomic classification that is shared by these organisms?
a. species b. genus c. family d. order
The anterior pituitary gland is controlled by which three types of signals? (Check three.)
_____ direct axonal connections from the hypothalamus _____ negative feedback from its own hormones _____ negative feedback from hormones secreted by the thyroid, adrenal cortex, and gonads _____ positive feedback from its own hormones _____ positive feedback from hormones secreted by the pancreas, heart, and skin _____ releasing hormones secreted by the hypothalamus 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 the anterior pituitary gland? 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? Reflect 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?
Two species of Gelsemium spp., a flowering vine plant, share the same habitat and have similar insect pollinators. However, pollination occurs for Gelsemium semperviren from mid-January to late March, and for Gelsemium rankinii from late March to mid-April. This represents
A. gametic isolation. B. a process analogous to behavioral isolation in animals. C. temporal isolation. D. ecological isolation. E. mechanical isolation.