The kidney releases ____________________ to stimulate red blood cell formation. Fill in the blank(s) with the appropriate word(s)
ANSWER: erythropoietin
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An allele whose expression is completely masked by the expression or effect of its allelic partner is
(a) homologous. (b) homozygous. (c) dominant. (d) recessive.
A key feature of all viral infections is the
A. integration of viral DNA into host DNA. B. disintegration of host DNA. C. addition of a lipid membrane to the virus. D. separation of viral nucleic acid from the capsid.
The three-dimensional shape of a protein is determined by the ____ and the results of chemical modifications and
other processing events. a. interaction of R groups b. interaction with other polypeptide chains c. amino acid sequence d. bonds formed with other proteins e. initiation complex
Natural selection drives evolution through the following forces except
A. competition for food. B. predators. C. climate. D. reproduction. E. competition for mates.