A trip to space finds a planet rich with green light. Scientists hope to introduce a photosynthetic organism to this
planet. What sort of organism should they choose?
What will be an ideal response?
ANSWER: This would be difficult, but a plant rich in phycoerythrobilin might work as that pigment is
able to absorb green light.
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Which of the following statements applies to sexually reproducing species but not asexually reproducing species?
A. Reproduction can occur with either one or two parents. B. The two "daughter" cells that result from cell division following mitosis are genetically identical to each other and to the original "parent" cell. C. Two kinds of cell division are required. D. Offspring are able to reproduce.
Suppose that R is the dominant allele for a round pea, and r is the recessive allele for a wrinkled pea. Suppose also that you cross plants having round peas with plants having wrinkled peas. Which of the following is the most likely result?
a. The offspring will be neither round nor wrinkled. b. The offspring will be mostly wrinkled. c. The offspring will all be wrinkled. d. The offspring will all be round.
In the successional sere on abandoned fields in the Piedmont of North Carolina, which of the following herbaceous species is most likely to persist until the arrival of shrubs and trees?
A) crabgrass B) horseweed C) ragweed D) aster E) broomsedge
Which of the following statements about rabies is FALSE?
A) It is caused by Lyssavirus. B) Hydrophobia is associated with the disease. C) Most infections in the U.S. are the result of bites from infected dogs. D) Diagnosis is based on immunofluorescent techniques. E) Average incubation period is 30 to 50 days after initial infection.