Which of the following can be appropriately classified as a Cnidarian?
a. isopods
b. corals
c. crayfish
d. centipedes
b. corals
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Scientists began to question the perfection of
the Chain of Being because of a. the discovery of new organisms in new parts of the world. b. the presence of body parts with no apparent function in some organisms. c. the existence of fossil forms. d. similarities in the structures found in different forms of life. e. all of these.
An extreme case of Rh disease is known as
a. hemolytic disease of the newborn. b. Down syndrome. c. Tay-Sachs disease. d. sickle cell anemia. e. polycythemia.
The main function associated with the structure of villi and microvilli is
a. secreting digestive enzymes. b. increasing surface area. c. secreting hormones. d. trapping bacteria. e. moving food through the intestines.
A friend tells you that vintners use yeast that produce alcohol to turn grape juice into wine. He also observes that wine must still have living yeast in it because vintners don't pasteurize wine to kill the yeast. To make wine himself, he explains, he
added wine to grape juice with the expectation that the yeast would turn the juice into wine. It didn't work, and your friend wonders why not. In terms of population ecology, what can you explain to your friend about the death of his yeast? What will be an ideal response?