What was the first seed plant to appear?
a. angiosperm
b. bryophytes
c. gymnosperm
d. nonvascular plants
Answer: c. gymnosperm
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If bacteria living in salty seawater were displaced to a freshwater environment, the cell structure that would prevent the cells from rupturing is
A. cell wall. B. capsule. C. slime layer. D. cell membrane. E. endospore.
The ________ is a factor-independent termination site found in the leader region of certain operons, which, under the influence of ribosome behavior, controls the continued transcription of that operon.
A. terminator B. operator C. attenuator D. modulator
When experimenting with Streptococcus pneumoniae in the 1920s, Griffith concluded that some substance from the dead S strain bacteria passed to the R strain bacteria, imparting virulence and the ability to form a capsule. Avery and others continued the search for the substance that "transformed" the R strain into the S strain.Hypothesis I:Genetic material or "transforming substance" is protein.Hypothesis II:Genetic material or "transforming substance" is RNA.Hypothesis III:Genetic material or "transforming substance" is DNA.An experiment was performed that demonstrated that DNA extracted from the S strain bacteria transformed R strain bacteria. This finding
A. supports Hypothesis I. B. supports Hypothesis II. C. supports Hypothesis III. D. rejects Hypothesis I only. E. rejects Hypothesis II only. F. rejects Hypothesis III only. G. does not support any of these hypotheses.
Carbon is stored in what form(s)?
a. biomass b. fossil fuels c. terrestrial rocks d. shells of animals e. all of these