Which of the following explains why Mendel used the garden pea as his model system?
a. The plant rarely produces offspring that looks like the parent.
b. The plant did not require Mendel to perform hybridizations.
c. The plant had been used by Mendel in previous experiments.
d. The plant has flowers that close securely during self-pollination.
d. The plant has flowers that close securely during self-pollination.
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The high incidence of Ellis–van Creveld syndrome among the Old Order Amish population is caused by ____
a. a population bottleneck b. artificial selection c. sexual selection d. inbreeding e. random mating
The single long process that extends from a typical motor nerve cell is the
a. axon. b. neuron. c. synapse. d. dendrite. e. cell body.
In a wind-pollinated species, which of these floral parts is likely to be inconspicuous or absent?
A. pistils B. stamens C. stigmas D. petals E. receptacle
Which drug, if it were legal, would you recommend for a patient who has little or no appetite, such as a person on chemotherapy?
A) cocaine B) opium C) amphetamines D) marijuana