The presence of a lophophore in a newly discovered species would suggest that the species _____
A) has an exoskeleton
B) grows by shedding its external covering
C) is more closely related to an arthropod than a mollusk
D) is motile
E) is a suspension feeder
Answer: E
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The most effective level of defense against pathogens is the ____ immune system, because it ____
a. innate; recognizes specific pathogens b. adaptive; recognizes specific pathogens c. nonspecific; targets all pathogens d. inflammatory response; is mediated by T cells e. skin; provides a physical barrier against pathogens
Aerobic respiration in plants occurs
a. continually. b. only in the daytime. c. only at night. d. sporadically
A woman has six fingers, but one of her parents has five fingers. She marries a man who has
five fingers. What is the probability that they will have a child who has five fingers?
a. 0 percent b. 25 percent c. 50 percent d. 100 percent
How much mercury can the average human safely consume per day?
a. 2 micrograms b. 7 micrograms c. 12 micrograms d. 55 micrograms e. 90 micrograms