The extra-embryonic membrane that forms the
majority of the placenta is the
a. amnion.
b. allantois.
c. chorion.
d. yolk sac.
e. umbilical cord
C
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If a carbohydrate is going to be broken down for energy, which of the following molecules would be directly involved in the breakdown?
A. Catabolic enzymes B. Nucleotides C. Anabolic enzymes D. Lipids E. Chromosomes
Your colleague is studying a newly discovered organism. She is becoming increasingly convinced that the organism is an arthropod. You find that you must respectfully disagree when you note that the organism has a set of distinctly nonarthropod characteristics. The features that cause you to exclude the organism from the arthropod grouping are
A. jointed legs, ecdysis, and an exoskeleton. B. antennae, six legs, and mandibles. C. compound eyes, book lungs, and a hemocoel. D. Malpighian tubules, ommatidia, and tagmata. E. pseudocoel, closed circulatory system, and ventral heart.
If a hypothetical protein is 25 amino acids long, how many nucleotides were there in the gene that
coded for this protein? A. 25 D. 100 B. 50 E. 150 C. 75
According to the Food Guide Pyramid, one double cheeseburger ____ the daily recommended quantity of meat.
A. exceeds B. is about one-half of C. is about one-third of D. is about one-quarter of