Interpreting stable isotopic fractionation depends on the fact that most enzymes preferentially bind ________ isotope substrates over ________ isotope substrates
A) nonradioactive / radioactive
B) light / heavy
C) heavy / light
D) radioactive / nonradioactive
Answer: B
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In models of logistic population growth, _____
A) the population growth rate slows dramatically as N approaches K B) new individuals are added to the population most rapidly at the beginning of the population's growth C) new individuals are added to the population as N approaches K D) only density-dependent factors affect the rate of population growth E) carrying capacity is never reached
Heterozygous
What will be an ideal response?
If one reproductive strategy of a eukaryotic organism is gamete fusion, what can be concluded about that organism?
A. The organism participates in horizontal gene transfer. B. Progeny organisms are identical to each other. C. The organism participates in vertical gene transfer. D. The organism reproduces asexually.
Plants first moved onto land at least ________ years ago
A) 65 million B) 475 million C) 1.2 billion D) 3.5 billion