An ________ is the result of an alteration of gene expression rather than a mutation of a gene.
Fill in the blank(s) with the appropriate word(s).
epigenetic change
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The average time it takes for actively dividing human cells to complete one cycle of division and growth, and be ready for another division, is about 24 hours
Given that there are 50-100 trillion cells in a human body, how long would it take to go from fertilized egg to the time the baby is born? A. 45.5 days B. 4.5 days C. 9 months
Not all animals are able to hear. The sense of hearing exists in organisms of the phyla
_____ arthropods. _____ mollusks. _____ vertebrates. _____ cnidarians.
Which of the following best describes the behavior of a gated channel?
(a) It stays open continuously when stimulated. (b) It opens more frequently in response to a given stimulus. (c) It opens more widely as the stimulus becomes stronger. (d) It remains closed if unstimulated.
Which correctly represents the sequence of steps involved to convey sensory information to the CNS?
A. Neurotransmitter release and ion flow through the synaptic cleft B. Stimulation and ion flow through the synaptic cleft C. Neurotransmitter release and interpretation D. Stimulation, transmission, and neurotransmitter release E. Stimulation, transduction, transmission, and interpretation