What is the most likely source of various hangover symptoms?
a. acetate
b. acetaldehyde
c. ethanol
d. alcohol dehydrogenase
e. carbon dioxide
ANSWER: b
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Which characteristic is NOT associated with red muscle fibers?
a. myoglobin b. fast fibers c. many blood vessels d. make up postural muscles e. large amounts of oxygen
Carbon dioxide is carried from the tissues to the lungs by a variety of mechanisms
Which of the following lists these mechanisms in order representing the mechanism that carries the most carbon dioxide to the mechanism that carries the smallest amount? A) bicarbonate—carbaminohemoglobin—dissolved in plasma B) bicarbonate—dissolved in plasma—carbaminohemoglobin C) dissolved in plasma—bicarbonate—carbaminohemoglobin D) carbaminohemoglobin—bicarbonate—dissolved in plasma E) carbaminohemoglobin—dissolved in plasma—bicarbonate
If you were a paleontologist studying clams, you would have an easier research project than if you were studying early
plants. Why? Include in your discussion the term megafossils. What will be an ideal response?
Which of the following could be an agent of natural selection?
A. accidental death of cows by lightning strikes B. insects that are eaten after they have reproduced C. characteristics of female animals that cause males to avoid them D. increases in the population size