The root tip is indicated by
a. A.
b. B.
c. C.
d. D.
e. E.
Answer: c
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patient with melanoma receives three types of therapy: surgery, radiation, and interferon. Which of these represents something the immune system uses against cancer as well?
A. Radiation -- a class of lymphocytes uses powerful electromagnetic radiation to attack "altered self" cells. B. Interferon -- TH cells and NK cells secrete interferon in response to tumor cells. C. Interferon -- NK cells insert interferon into the membranes of tumor cells, creating large pores that burst the cells. D. Interferon -- In complexes bound with MHC proteins, the interferons indicate the presence of altered tissue to B cells. 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 actions of the immune system? 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?
You discover a new organism while on vacation in Yellowstone Park. You use a series of experiments to establish that it carries out aerobic respiration, but find that it has a unique ATP synthase that requires 16 protons per rotation. What does this tell you about the P/O ratio in this organism?
A. The new organism only makes ATP by substrate-level phosphorylation. B. The P/O ratio in the new organism is higher than your P/O ratio. C. The P/O ratio in the new organism is lower than your P/O ratio. D. The P/O ratio in the new organism is the same as your P/O ratio.
Which structure grows faster than any other as the embryo develops?
a. the heart b. the nervous system c. the head d. the digestive system e. the urinary system
Which species name means “upright man”?
a. Homo erectus b. Homo habilis c. Australopithecus afarensis d. Homo floresiensis e. Neanderthals