Differential gene expression is defined as the:a
ability of some cells to arrest their development under varying environmental conditions.
b. progressive fixation of the fates of a cell's descendants.
c. genetic variation found in various somatic cells of the same individual.
d. regulation during development that varies the type and quantity of gene products among cells.
e. constitutive expression of all genes in the somatic cells.
d
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Representatives of free living flatworms are:
a. turbellarians. b. cestodes. c. trematodes. d. tapeworms. e. polychaetes.
A chromosome library is a collection of all of the DNA:a
that occurs in one species. b. contained in one chromosome. c. that would be found in the chromosomes of a typical cell of a particular organism. d. in a recombinant gene. e. that codes for functional enzymes in a chromosome of a particular organism.
Cephalic Phase
What will be an ideal response?
Directional selection is more likely to be weak than strong.
a. true b. false