The method by which cell components are separated by centrifugation at progressively higher speeds is called _______ centrifugation.
a. differential
b. velocity
c. density-gradient
d. equilibrium
Ans: a. differential
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The function of the viral protein coat is to
A. protect the viral genetic material. B. protect the viral genetic material and aid in the transfer of the viral genetic material between host cells. C. elicit the production of protective antibodies. D. aid in the transfer of the viral genetic material between host cells.
The Porifera and Cnidaria have superficially similar body plans. Indicate which of the following does NOT describe equivalent features in the two groups.
A. spongocoel and gastrovascular cavity B. mesohyl and mesoglea C. osculum and mouth/anus D. epithelial cells and epidermis E. spongin and polyp
Mammals have opposing groups of muscles at a joint; for example, the ________ flexes the forearm and the ________ extends it
a. biceps / triceps b. triceps / deltoid c. deltoid / pectoralis d. pectoralis / triceps
Unless rare antigens are present ideally, a patient needing a transfusion will receive blood of the identical blood type. But in an emergency, what blood type can be given in a transfusion to anyone?
A. AB Rh-positive B. AB Rh-negative C. O Rh-negative D. O Rh-positive E. A Rh-positive 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 blood typing? 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?