When blood oxygen decreases, what hormone increases red blood cell synthesis by stem cells in the bone marrow?
A. Erthropoietin
b. Aldosterone
c. Renin
d. Antidiuretic hormone (ADH)
Answer: A. Erthropoietin
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Which "alternate" hypothesis might also explain industrial melanism?
A. Dark moths are more resistant to the toxic effects of pollution than light moths. B. Dark moths emigrate out of polluted areas to escape the pollution. C. Pollution kills important tree species that peppered moths depend on for egg laying. D. Because dark moths absorb more heat, they are more active and better able to avoid bird predation. E. Birds used the marks that Kettlewell placed on the moths when he released them to help them find and capture the moths. 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 natural selection? 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?
What is the most likely explanation for the extinction of giant kangaroos in Australia?
a. glaciers b. asteroids c. hunting d. giant squid
What will happen when the supply of ATP increases above normal levels?
a. Production will stop until ATP levels normalize. b. Sulfhydryl CoA production will accelerate. c. The rate of citrate production will decrease. d. The cell will temporarily produce GTP instead.
To convert a nucleoside into a nucleotide, what moiety must be added?
A. One or more double bonds B. One or more pyrimidine bases C. One or more purine bases D. One or more phosphate groups