Movement of substances that requires the expenditure of ATP molecules is called ____
a. facilitated diffusion
b. simple diffusion
c. osmosis
d. active transport
e. bulk flow
ANSWER: d
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Whiteflies are common pest insects found on cotton, tomato, poinsettia, and many other plants. Nymphs are translucent and mostly sessile, feeding on their host plants' phloem (sap) from the undersides of leaves. T
hey undergo incomplete metamorphosis into winged adults. Because whitefly nymphs cannot escape predation by moving, you hypothesize that their translucent bodies make them hard to spot by predators. How could you directly test this hypothesis? A) Compare rates of predation on whitefly nymphs on plant leaves of different colors (for example, red vs. green poinsettia leaves). B) Compare rates of predation on whitefly nymphs coated with a nontoxic dye vs. undyed whitefly nymphs. C) Compare rates of predation on whitefly nymphs vs. whitefly adults. D) Compare rates of predation on whitefly nymphs by predators that are translucent vs. predators that are not translucent. E) Compare rates of predation on whitefly nymphs feeding on poisonous plants vs. those feeding on nonpoisonous plants.
If a single gene has 3 or more alternative forms, this is called
A. pleiotropy. B. multiple alleles. C. epistasis. D. blending inheritance. E. codominance.
Four of the five answers listed below follow a
type III survivorship curve. Select the EXCEPTION.
a. most insects b. most reptiles c. many fishes d. humans e. most marine invertebrates
Sweat can cause damage to bacteria because it contains salt and lysozyme
Indicate whether the statement is true or false