Due to ____, trophic level affects the pollutant concentration in an organism's tissues.
A. bioaccumulation
B. biological magnification
C. ecosystem degradation
D. the ozone layer
E. ground-level ozone
Answer: B
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Diets that include complex carbohydrates instead of simple carbohydrates are recommended because sugar is released more slowly into the body
Indicate whether the statement is true or false
Which organisms obtain heat primarily from the external environment?
a. endotherms b. ectotherms c. exotherms d. isotherms
Drug addiction occurs when the central nervous system
A. initiates new cell growth that depends on continual input of the drug. B. stores the drug between neurons in the cerebral cortex for later use. C. uses the drug as its sole neurotransmitter. D. adjusts to the increased firing of neurons by reducing the number of membrane receptors in postsynaptic membranes.
All of the following events occur between weeks 17 and 20, EXCEPT
A. Eyebrows and hair develop. B. Fetal movements may be perceived by the mother. C. Lanugo develops, providing structural support to the vernix caseosa. D. Substantial amounts of white fat develop. E. Vernix caseosa develops, protecting the fetal skin from the amniotic fluid.