Mutations can create new alleles that
A. are beneficial to the organism's fitness.
B. have no effect on the fitness of the organism.
C. decrease the fitness of the organism.
D. All of the choices are correct.
D. All of the choices are correct.
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Which of the following is a source of carbon skeletons that are used in the synthesis of amino acids?
A. Acetyl-CoA B. Glycolysis intermediates C. TCA cycle intermediates D. All of the choices are correct.
The taiga is best described as what type of
forest? a. deciduous b. thorn c. evergreen coniferous d. broad-leafed e. shrub
The universal regulatory mechanism in eukaryotes for controlling gene expression includes
A. control of the processing of mRNA after it is transcribed from DNA but before it leaves the nucleus, and control of the rate it leaves the nucleus. B. control of the genes transcribed and the rate they are transcribed. C. control of mRNA in the cytoplasm after it leaves the nucleus, including changes to mRNA before translation begins. D. control of polypeptides after they have been synthesized but before they are functional. E. All of these mechanisms are used; there is no single universal mechanism.
If you were working with a patient and were told urine was blocked at the last step before exiting the body, you would try to find a technique or drug to unblock the
What will be an ideal response?