Exocytotic vesicles develop from the membranes of
which of the following structures?
a. mitochondria
b. Golgi bodies
c. lysosomes
d. vacuoles
e. phagocytes
Answer: b
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An overgrowth of algae is often directly the result of
a. fertilizer run off. b. too little rainfall. c. too little sunlight. d. too much sunlight.
In transformation, cells
a. take up pieces of DNA that are released as other cells disintegrate. b. take up pieces of DNA through infection of a virus. c. replicate DNA molecules. d. make replicate copies of one another. e. generate their own DNA.
Small doses of ionizing radiation over a long period of time cause less damage because
a. they are too low to affect cells. b. they don't hit as many targets. c. the body has time to repair damaged DNA. d. the radiation is absorbed by macrophages. e. the radiation is absorbed by red blood cells.
The movement of sugars in a plant can be explained by
a) capillary action. b) transpiration pull. c) the pressure-flow hypothesis. d) root pressure.