Which blood type is rare
?
a. A only
b. B only
c. AB
d. O
e. Both AB and O
ANSWER: c
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The left ventricle in mammals is more muscular than the right ventricle because
A. the right ventricle only pumps blood into the right atrium. B. the left ventricle has to pump blood throughout the body at high pressure. C. the left ventricle pumps more total blood than the right ventricle. D. the left ventricle is always contracting to maintain a systemic blood pressure. E. the left ventricle pumps blood with a higher hematocrit than the blood that leaves the right ventricle. 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 the mammalian heart? 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?
A loaf of bread was left uncovered for two weeks on a scale measuring its mass. Mold grew on it, decomposing the bread. Assuming that the bread did not dry out, which of the following is a reasonable prediction of the weight of the bread and mold together?
What will be an ideal response?
Anna is conducting an experiment using a pH indicator that is red at low pH, green at neutral pH and purple at high pH. She starts with a green solution. When she adds compound X to her solution it turns purple. Then she adds compound Z to the solution
and it turns green. She adds more Z, the solution remains green. These observations suggest X is ________ and Z is ________. A) a base; a buffer B) an acid; a base C) a base; a strong acid D) an acid; a buffer E) a buffer; a base
In an organism with 60 chromosomes, how many bivalents would be expected to form during meiosis?
A) 120 B) 240 C) 30 D) 15 E) 60