Three college students purchased a bag of fresh-picked, unripened apples from a nearby orchard. Keeping the apples in a paper bag for several days, the apples ripened. This was a response to the plant hormone
A. auxin.
B. ethylene.
C. gibberellin.
D. jasmonic acid.
E. abscisic acid.
B. ethylene.
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A pea plant is heterozygous (Aa) for seed color and heterozygous (Bb) for seed shape. According to Mendel's principle of independent assortment:
A. each gamete will have either a seed color allele or a seed shape allele. B. a gamete that receives the dominant allele for seed color will also receive the dominant allele for seed shape 100% of the time. C. a gamete that receives the dominant allele for seed color is equally likely to receive the dominant allele for seed shape as it is the recessive allele for seed shape. D. possible gamete phenotypes are Aa, Bb, AB, and ab; each is equally likely to occur. E. possible gamete phenotypes are AB or ab; each is equally likely to occur.
What structure in most ray-finned fish is responsible for buoyancy control?
a. Gas gland b. Blubber c. Squaline d. Swim bladder
Nerve impulses coming into the spinal cord enter via ____.
A. intervertebral disks B. neuroglia C. the dorsal roots D. Broca's area E. ventral roots
What would be a consequence of a missing or damaged epiglottis?
a. an inability to swallow food b. digestive acid escaping into the esophagus c. aspiration of food into the lungs d. incomplete neutralization of chyme