Enzymes speed chemical reactions by
A. supplying energy to the reaction process.
B. lowering the energy required to start a chemical reaction.
C. lowering the amount of reactants that are needed.
D. maintaining chemical equilibrium.
E. raising the temperature of the surroundings.
B. lowering the energy required to start a chemical reaction.
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Both root hairs and mycorrhizae _________. (Select all correct answer options.)
A. increase the surface area for nutrient uptake B. consume carbohydrates C. increase the volume of soil accessible to the plant D. enhance the binding of the roots to the soil
If an individual is heterozygous for a particular trait
A. each parent contributed a different allele for that trait. B. one parent contributed two copies of the same allele for that trait. C. one parent contributed two different alleles for that trait. D. each parent contributed the same allele for that trait.
Low sperm count may result in an insufficient amount of enzyme to clear a path through the ____to the egg plasma membrane.
Fill in the blank(s) with the appropriate word(s).
Which hepatitis virus only results in acute infections?
A) hepatitis A B) hepatitis B C) hepatitis C D) hepatitis D E) hepatitis E