What is the study of the genetic variability within a population and the forces that change allele frequencies?
a. evolution
b. allele genetics
c. variable ecology
d. population genetics
e. evolutionary genetics
ANSWER: d
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While eating lobster for dinner one night your friend asks what you think might happen if this marine invertebrate, which is normally isosmotic with respect to the surrounding seawater, were to be moved to a bay with a slightly lower salt concentration instead of being caught. You reply that, in order for the lobster to be isosmotic with respect to new environment,
A. it must move water in to match the solute concentration of its new environment. B. it regulates its internal concentration of solutes to match that of its new environment. C. it must move water out to match the solute concentration of its new environment. D. it moves water in or out and regulates its internal concentration of water as needed. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about adaptation to a change in the salinity? What other information is related to the question? 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?
Receptors for ________ hormones are located on the plasma membrane and affect target cells by _________
A. amine; activating protein kinase enzymes B. steroid; activating protein kinase enzymes C. peptide; forming hormone-receptor complexes that activate or inhibit gene expression D. steroid; forming hormone-receptor complexes that activate or inhibit gene expression E. amine; forming hormone-receptor complexes that activate or inhibit gene expression
Symptoms of cryptosporidiosis include
A. chills, fever, and sweats. B. bloody, mucus-filled stools and fever. C. a red skin papule that spreads to a large ulcer. D. headache, sweats, vomiting, severe abdominal cramps, and diarrhea.
Man's pollution of public water sources includes
a. pesticides. b. fertilizers. c. carcinogenic chemicals. d. radioactive materials. e. all of these.