Amphipathic organic molecules that serve as disinfectants by disrupting membranes and denaturing proteins are called ________.
A. sterilants
B. soaps
C. detergents
D. oxidants
Answer: C
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The figure below shows results of bristle number in Drosophila flies after 35 generations of artificial selection. This figure suggests that
A. bristle number has evolved beyond the original range of phenotypic variation for this trait.
B. after 35 generations of selection, populations no longer exhibit variation in bristle number.
C. natural selection cannot lead to large phenotypic changes.
D. at the end of the experiment, "high population" flies were unable to interbreed with "low population" flies.
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 artificial 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 function does the presence of alkaline components in pancreatic juice serve?
a. They create an optimum environment for digestion in the small intestine. b. They neutralize the acidity of stomach. c. They stimulate peristalsis in the small intestine. d. They create an optimum environment for digestion in the stomach. e. They stimulate peristalsis in the stomach.
Which of the following statements is false?
a. Connective tissue of the cervix weakens during the final weeks of pregnancy. b. It is not possible for a woman to become pregnant after engaging in intercourse if the male does not ejaculate. c. The rupture of the amniotic sac with the release of its fluid is one of the events that usually precedes birth. d. After the baby is born, uterine contractions continue so that the placenta is expelled. e. Just as females should examine their breasts each month for possible lumps, males should also self-examine their testes for lumps that possibly indicate cancer.
Eutrophication
A. occurs when there are excess nutrients in aquatic ecosystems. B. can block the O2 supply to the lake. C. causes massive die-off of fish and invertebrates. D. encourages heavy surface algal blooms. E. All of the choices are correct.