A scientist wants to conduct an experiment to see if plants will grow to different heights based on the type of fertilizer used. If the scientist provides the plants with the same amount of water every day, the water would represent which of the following?
a. a dependent variable
b. an independent variable
c. a control
d. a placebo
c. a control
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A ____ is an extension of a lobe of the cytoplasm, which is used by some protists for movement
a. gullet b. pseudopod c. cilium d. pilus e. flagellum
Which statement is false with regard to adult cell cloning?
A. It involves differentiated cells. B. It occurs with some frequency in nature. C. It involves rewinding the developmental clock. D. It involves an egg cell that has had its nucleus removed. E. It may involve nuclear transfer.
Theory predicts that communication between mutualistic species should be favored if such communication results in an increase of individual fitness in both species
Can the experiment displayed below determine whether communication results in a fitness advantage in Iri-domyrmex ants and imperial blue butterflies? a. Yes, the experiment tests whether caterpillars communicate with ants; communication would not evolve in the absence of a fitness advantage. b. Yes, ants that respond to butterfly pupa stridulations have a higher fitness. c. No, gain or loss of fitness is not tested in this experiment. d. No, only the ants' fitness is tested.
The following sequence represents events in the development of a fruit
A. pollination; fertilization; embryo; ovary matures. B. pollination; fertilization; germination of pollen; ovule matures; embryo forms. C. pollination; endosperm; embryo; ovule matures. D. pollination; double fertilization; ovule matures; embryo forms; ovary matures. E. pollination; germination of pollen; endosperm; ovule.