Convergent evolution gives rise to analogous structures in unrelated taxa
a. true
b. false
Ans: a. true
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A disease showing a relatively slow, progressive rise followed by a gradual decline in incidence is indicative of a(n)
A) host-to-host epidemic. B) common source epidemic. C) biological weapon. D) endemic disease.
A trade-off for having many offspring would be
A) that they would likely be small in size. B) that they would likely be large in size. C) that they would require a large amount of parental care. D) that they would have high survivorship.
Which of the following is an INCORRECT statement about restriction enzymes?
A) Most restriction enzymes are isolated from bacteria. B) Restriction enzymes usually recognize palindromic sequences. C) Restriction enzymes create phosphodiester bonds between pieces of DNA in a cloning experiment. D) Restriction enzymes can cut to create overlapping single-stranded ends of DNA. E) Restriction enzymes can cut to create blunt-ended pieces of DNA.
Oil-degrading bacteria are naturally present in the environment but cannot degrade an oil spill fast enough to avoid ecological damage. How can the actions of these bacteria be sped up?
a. Provide oil for them. b. Provide sugar as a carbon source. c. Provide nitrogen and phosphorus. d. Add water. e. Add NaCl.