Organs strung together functionally and usually structurally form
(a) organs.
(b) systems.
(c) tissues.
(d) organelles.
(d) organelles.
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What adaptation allows C4 plants to minimize the effects of rubisco's inefficiency at high temperatures?
a. C4 plants fix the carbon twice in two different types of cells. b. C4 plants fix the carbon twice at two different times of day. c. C4 plants fix the carbon only once.
d. C4 plants store products in vacuoles. e. C4 plants only fix carbon at night.
Which of the following U.S. agencies oversees phase testing of drugs prior to their approval for clinical uses?
A) USDA B) EPA C) FDA D) NIH E) NSF
An amoeba, a protozoan that moves by pseudopodia, approaches a smaller protozoan and extends its pseudopodia (extensions of cytoplasm in plasma membrane) around the smaller protozoan. Once the amoeba's pseudopodia completely surrounds the other protozoan, the amoeba's plasma membrane pinches off by folding back into the amoeba and creating a vesicle containing the smaller protozoan. This vesicle is now within the amoeba itself and will soon fuse with other vesicles containing digestive enzymes. This is an example of
a. pinocytosis. b. exocytosis. c. osmosis. d. phagocytosis.
You find a plant unfamiliar to you and observe that it has vascular bundles scattered throughout the stem cross section. What do you conclude about the plant?
A) It is probably an herbaceous eudicot. B) It will probably get annual rings of wood. C) It is probably a monocot. D) It could be either a young eudicot or a monocot.