How many copies of each chromosome will a tetraploid organism have?
a. 1
b. 2
c. 4
d. 8
e. 10
C
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Noncompetitive inhibition of enzymes occurs
A. when a cofactor, instead of a reactant, binds to the enzyme active site. B. when the product, instead of the reactant, of a reaction binds to the active site. C. by blocking the production of an enzyme. D. when a substance binds to an enzyme at a site away from the active site. E. when a substance other than the substrate binds at the active site of an enzyme.
Members of which of the following groups can
be single-celled producers?
a. plantae b. protista c. bacteria d. bacteria and protista e. bacteria and plantae
Order ____ includes the turtles and tortoises
a. Crocodilia b. Squamata c. Testudines d. Saurischia e. Pterosauria
Which statement best describes a typical food chain?
a. An owl has a positive impact on the grass population. b. An owl has a negative impact on the grass population. c. A carnivore has a negative effect on primary producers. d. Energy can flow back and forth between trophic levels. e. Energy is never lost as it moves from one trophic level to the next.