A mutant plant is found in which the seeds germinate far too early. Which hormone is likely involved and why? What will be an ideal response?
ANSWER: It is likely that abscisic acid is involved. Abscisic acid accumulates in seeds and prevents
their germination. Only when the abscisic acid levels decline can gibberellins be synthesized
and germination begin. The premature germination of these seeds suggests an issue with
abscisic acid.
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Many algal species have life cycles consisting of alternating haploid and diploid generations. The most common life
cycle in green algae consists of organisms that are ____ in the haploid stage and ____ in the diploid stage.
a. unicellular; multicellular b. multicellular; unicellular c. unicellular; unicellular d. multicellular; multicellular e. colonial; colonial
Which of the following was the first protein whose tertiary structure was determined?
A) myoglobin B) insulin C) actin D) hemoglobin E) collagen
What structure is involved in the human sense of balance?
A) outer ear B) oval window C) utricle D) basilar membrane
A terrorist would MOST likely disseminate smallpox via:
A) a powder. B) an explosion. C) a dirty bomb. D) aerosolization.