Gaps in fossil record _____________.
a. demonstrate our inability to date geological sediments
b. are expected since the probability that any organism will fossilize is extremely low
c. have not been filled in as new fossils have been discovered
d. weaken the theory of evolution
Answer: b. are expected since the probability that any organism will fossilize is extremely low
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Condensation reactions typically produce
a. monomers. b. salts. c. polymers. d. simple sugars. e. amino acids.
The greatest number of endemic species is expected in environments that are _____
A) easily reached and ecologically diverse B) isolated and show little ecological diversity C) isolated and ecologically diverse D) easily reached and show little ecological diversity
SAR11 bacteria are now thought to constitute about ________% of all microbial life on earth.
A. 75 B. 10 C. 5 D. 25
Microorganisms are essential to our life. Each of the following is an example of a beneficial function of microorganisms EXCEPT
A) alternative fuel production. B) bioremediation. C) gene therapy. D) agriculture. E) increased number of illnesses.