Which of the following is a TRUE statement
concerning ecosystems?
a. Energy flow through an ecosystem is one
way and nutrients are recycled.
b. Energy and nutrients are both recycled.
c. Energy flow and nutrient flow are both one
way.
d. Nutrient flow through an ecosystem is one
way and energy is recycled.
e. None of these statements is true.
A
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You are a professor supervising first year medical students. One student is examining the adrenal gland of his cadaver. "Wow!" he exclaims, "This person must have had an endocrine problem. Their adrenal gland lacks any kind of duct connecting it to the bloodstream. The hormones could only have oozed out." How do you respond?
A. "That makes their adrenal gland similar to an exocrine organ." B. "Do you see signs of adrenal insufficiency, such as low fat stores or muscle degeneration?" C. "That's normal. The hormones ooze out and diffuse into nearby capillaries, which is why endocrine glands are sometimes called 'ductless glands'." D. "Look carefully and you will see the nerves that transport the hormones into the bloodstream." 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 adrenal 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?
A bacterium possessing a tuft of flagella at one end of its cell is called
a) amphitrichous. b) lophotrichous. c) monotrichous. d) peritrichous.
Adult stem cells have limited therapeutic potential
A) because they are fully differentiated. B) because they lack a complete set of genes. C) due to their excessive numbers in tissues. D) because their developmental potential is limited to certain tissues.
Aseptic means
A) sterile. B) free of all microbes. C) clean. D) sanitized. E) free of pathogens.