Describe how the FTO gene is an example of epigenetics (the ability of environment to influence how a gene is expressed)
What will be an ideal response?
There is a variant of the FTO gene that raises the risk of obesity in people that consume a high-fat diet. If these people eat a diet high in folate and B vitamins, that gene will be turned off.
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____ may have been the ancestors of cellular life
a. Circular RNA b. Prokaryotic cells c. Pseudocells d. Lipid globules e. Protocells
Which of the following does NOT happen
when the body has excess sodium? a. More sodium is excreted. b. More sodium is reabsorbed. c. Edema occurs. d. Blood pressure rises. e. Aldosterone secretion is inhibited
A fish detects vibrations in the water by means of its ________, which contains numerous ________.
A. lateral line; thermoreceptors B. ear; statocysts C. skin; mechanoreceptors D. lateral line; hair cells E. swim bladder; stretch receptors
Which of the following does NOT characterize a virus?'
a. carbon-based molecules b. nucleic acid c. enzymes of respiration d. noncellular organization e. protein coat