Which of the following is an INCORRECT pairing?
A. viruses; acellular parasites
B. fungi; cell walls
C. protozoa; multicellular
D. prokaryotes; no nuclei
Ans: C. protozoa; multicellular
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What hormone stimulates the milk-ejection reflex?
A. antidiuretic hormone B. oxytocin C. vasopressin D. parathyroid hormone E. aldosterone
Which of the following gives rise to the embryo
during human development? a. trophoblast b. amnion c. inner cell mass d. chorion e. placenta
A community consists of ____ species in a given area
a. one b. two c. three d. four e. all
Which of the following characteristics about saprotrophs is NOT true?
A. They are bacteria that decompose large organic molecules. B. They are viruses that infect plant and fungal cells. C. Saprotrophs are also called decomposers. D. They are ecologically important in recycling matter.