Which of these is NOT a crustacean?
a. copepod
b. horseshoe crab
c. pill bug
d. barnacle
e. shrimp
Answer: b
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What is a likely explanation for why nothing happened in your experiment?
Sometimes the most practical way to do an experiment is not to perform it in an animal, but to look at cell responses in culture. Cells from mice, humans, and other mammals have been used to establish cell culture lines that have been very important for research. You are studying a novel water-soluble mouse hormone. You know cell culture can be a practical model to reveal protein function, so you apply the hormone to yeast cells, but nothing happens. A. Yeast have a cell wall, so the molecule cannot pass through the cell membrane as it would in mice. B. Water-soluble hormones are lipids, not proteins. C. You need to apply the hormone in large amounts to see an effect. D. Yeast may lack the receptor required for the hormone to act. 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 hormones? 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?
An instantaneous automatic response to a stimulus is a(n)
A. fixed action pattern. B. taxis. C. imprinting. D. learned behavior. E. reflex.
Accidents during meiosis that can result in trisomies and monosomies are called
a. nondisjunctions. b. inversions. c. reciprocal translocations. d. recombinations. e. acrocentricities.
HIV attaches to T cell and macrophages by means of an interaction between gp120 and a(n) (antibody/CD4/gp41 ) receptor
What will be an ideal response?