Which of the following contributes to the virulence of a pathogen?
A) numbers of microorganisms that gain access to a host
B) evasion of host defenses
C) toxin production
D) numbers of microorganisms that gain access to a host and evasion of host defenses
E) numbers of microorganisms that gain access to a host, evasion of host defenses, and toxin production
E
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Aerobic exercise affects muscle cells by
1.increasing the number of mitochondria. 2.increasing the size of mitochondria. 3.increasing the number of capillaries supplying muscle tissue. 4.increasing nourishment to the cells and waste removal from the cells. 5.all of the choices
NPP is the difference between plant photosynthesis and respiration. Therefore, NPP quantifies the net absorption of what element(s) by living plants?
A. carbon B. phosphorus C. nitrogen D. oxygen E. nitrogen, phosphorus, and potassium 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 productivity? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
Renin stimulates the secretion of aldosterone
Indicate whether the statement is true or false
In most male animals, the penis or other copulatory organ achieves erection by
A. artery dilation or hemolymph pressure. B. bones or exoskeleton interlocking. C. muscle contraction. D. testicular pressure.