Which of the following best explains why enzymes are necessary for many cellular reactions? a. enzymes change reactants from a solid to a liquid during the reactions.
b. the reactions are too slow to meet the needs of the cell of enzymes are missing.
c. the reactions take up too much space in the cell if enzymes are missing.
d. enzymes supply the oxygen necessary for the reactions.
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Asmall number of finches are removed randomly from the wild and placed in a protected bird area. they are given as much food as they need and have plenty of space. why would natural selection not occur in this population? a. there is no reason for genetic mutation to occur. b. the birds compete for limited resources, c. the population has not reached carrying capacity. d. there is no genetic variation in the finches.

Nucleic acid certain protein cell membranes certain carbohydrates

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different