Realized heritability may be determined from artificial selection experiments
Indicate whether the statement is true or false
TRUE
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Epigenetics is the study of heritable alterations in gene expression caused by ____
a. mechanisms that do not alter any DNA sequence b. the mutation of a single gene c. translocations between alleles d. environmental factors e. replication and then improper repair of DNA coding mistakes
The type of neuron that conducts its message from the central nervous system toward an effector is the
A. synaptic neuron. B. interneuron. C. motor neuron. D. sensory neuron. E. Schwann cell.
For the following list of anti-HIV drugs and their mechanism of action, identify the mismatch.
A. AZT (azidothymidine); as an analog of thymidine, it is incorporated into viral RNA in place of thymidine B. Protease inhibitor; blocks the active site of the protease required for assembling new viral particles. C. Reverse transcriptase inhibitor; blocks the active site of the enzyme required to convert viral RNA to DNA D. Integrase inhibitor; blocks the active site of the enzyme required to splice HIV DNA into the human genome
Companion cells are specialized cells found in which plant tissue?
A) meristematic tissue B) ground substance C) phloem D) xylem