Modern botanists think that all plants evolved from a common ancestor that was an ancient green alga,
because:a.
plants are green like green algae.
b. plants live on land.
c. they have green leaves.
d. they are autotrophs.
e. they share many biochemical and metabolic traits.
E
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You get the latest strain of the flu virus. How will your cytotoxic T cells respond?
A. They will secrete antigens. B. They will directly destroy the virus. C. They will secrete antibodies. D. They will destroy infected host cells. E. They will destroy all host cells.
The primary reason for the daylight migration of many pelagic animals to deeper waters is:
a. escape from visual predators. b. escape from the harmful effects of the sun. c. preference for the colder waters of the deep. d. the abundance of food in deeper waters.
Filtrate that is removed from the blood is collected by the:
a. loop of Henle b. glomerulus c. distal tubule d. proximal tubule e. Bowman's capsule
Hydrogen ion flow out of the thylakoid
compartments
a. occurs between photosystems I and II. b. is called hydrogen transfer system. c. provides energy to produce ATP molecules. d. causes excitation of chlorophyll molecules. e. requires the intermediary action of acceptor molecules.