The first level of gene regulation occurs along the chromosome, through chemical modifications of the DNA or histones
A. true
B. false
A
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When food residues remain in the colon for too long, too much water is reabsorbed, and the feces
become dry and hard, a person is suffering from a. diarrhea. b. colitis. c. constipation. d. gastritis. e. enteritis.
Phenotype is ____
a. only expressed in a heterozygous organism b. an observable property or expression of a trait in an organism c. the specific genetic constitution of an organism
d. the variation of genes e. cannot be determined by knowing genotype
How would the speed at which the electrochemical impulse travels down the axon be affected by decreased myelination of an axon?
A) It would decrease. B) It would increase. C) It would maximize. D) It would have no effect.
According to the biological species concept, two groups of organisms that are unable to form fertile, viable hybrids are considered to be different
A. species. B. hybrids. C. kingdoms. D. cohabitants. E. races.