Over the course of the earth's history, coral reefs have been built by (select all that apply)
A. bacteria.
B. reef-building sponges.
C. skeleton-forming green algae.
D. corals.
E. placozoans.
A,B,C,D
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Young male white-crowned sparrows that were experimentally raised without ever hearing the song of their species
____.
a. instinctively performed the song perfectly b. never sang at all c. sang a poorly developed, but similar, version of their species' song d. sang a recognizable version of an ancestral species’ song e. never sang the way wild males do
What type of mutation leads to a frameshift in the reading of DNA?
A. All point mutations B. Deletions only C. Insertions only D. Both insertions and deletions
Color blindness is an X-linked trait in humans. If a color-blind woman marries a man with normal
vision, the children will be a. all color-blind daughters, but normal sons. b. all color-blind sons, but carrier daughters. c. all normal sons, but carrier daughters. d. all color-blind children. e. all normal children.
Can a virus be killed?
A. Yes, separating the genes from the capsid kills it. B. Yes, destroying its genome kills it. C. No, viruses are capable of self-assembly and cannot be permanently killed. D. No, viruses are nonliving and cannot die.