Why do hormones affect some cells but not others?
What will be an ideal response?
Cells respond only to those hormones for which they have receptors.
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The disaccharide shown above is ____
a. sucrose b. maltose c. lactose d. cellulose e. fructose
The signal from the environment that triggers a stereotyped behavior is a
A. conditioned reflex. B. fixed action pattern. C. reinforcing stimulus. D. releasing mechanism. E. key stimulus (sign stimulus).
Kansas and Pennsylvania are approximately at the same latitude. Yet why are the potential natural communities in Kansas mostly grassland and in Pennsylvania mostly temperate forest?
A. different vegetation due to different seed banks B. different temperatures C. different levels of moisture D. different altitudes E. different soil texture and pH levels
________ are bone-absorbing cells and ________ are bone-forming cells.
A. Osteoclasts; osteoblasts B. Chondrocytes; lymphocytes C. Eosinophils; red blood cells D. Osteocytes; osteons E. Menisci; osteoclasts