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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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
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.
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.
Order ____ includes the turtles and tortoises
a. Crocodilia b. Squamata c. Testudines d. Saurischia e. Pterosauria