An active site is:
What will be an ideal response?
the part of the enzyme that binds with a substrate
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Heterotrophs include
A. consumers and decomposers. B. consumers only. C. producers and consumers. D. producers only. E. producers, consumers, and decomposers.
Biological magnification is best defined as ____
a. the increase in toxicity of a chemical compound resulting from its metabolism by a living organism b. the higher relative proportion of biomass among producers as compared to consumers in an ecosystem c. the concentration of nondegradable poisons within organisms at higher trophic levels d. the concentration of degradable poisons within organisms at lower trophic levels e. the declining relative proportion of nondegradable poisons in organisms at higher trophic levels as compared to those at lower trophic levels
Which of the following structures is not a modified leaf?
1.petal 2.sepal 3.carpel 4.anther
What are species of Rhizobium and Bradyrhizobium bacteria most directly associated with?
a. nitrification b. ammonification c. nitrogen cycling d. nitrogen fixation