What types of plants would you expect to find in an alpine tundra?
A. tall trees
B. aquatic plants
C. lichens and mosses
D. tall grasses
E. cactus
Answer: C. lichens and mosses
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Which feature, if added, would most change a hydrothermal vent ecosystem?
A. archaea B. tube worms C. sunlight D. very low pH E. temperatures of 100°C
From the late 1950s to the mid-1960s, numerous experiments using in vitro cell-free systems provided information on the nature of the genetic code. Briefly explain how the use of polynucleotide phosphorylase and the triplet binding assay were used to
decipher the genetic code and why the triplet binding assay was more precise. What will be an ideal response?
Which of the following can be found in bacteria, but not viruses?
A. a cell membrane B. genetic material C. nucleic acids D. proteins
Archbishop James Usher calculated the age of Earth based on the Old Testament. He estimated that the crea-tion of the world took place:
a. on exactly October 23, 4004 B.C. b. in 3998 B.C. c. between 75,000 and 2–3 million years ago. d. an inconceivably long time ago.