Most studies have found that 10% of American men are predominantly or exclusively homosexual
a. True
b. False
b
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Within-subjects designs reduce variability in the data compared with between-subjects designs.
Answer the following statement true (T) or false (F)
Answer the following statements true (T) or false (F)
1. Research on cell phone use and attention in driving suggests that laws requiring hands-free cell phones could significantly reduce accidents. 2. An organism's sensitivity to prolonged stimulation tends to increase over time. 3. Our perceptual systems respond more strongly to changes in the level of stimulation than to constant stimulation. 4. Our senses will adapt more quickly to a stimulus if that stim ulus is presented occasionally, rather than constantly. 5. The length of a light wave determines the brightness we perceive.
Glucostats are
A) cells that can detect glucose levels. B) drugs that block the absorption of glucose. C) hormones that help cells store glucose for future use. D) a category of sugars used by the brain and body for energy.
Katie wonders when she will first be able to hear her fetus’s heartbeat through a stethoscope. You tell her that this should happen by the __________
A) fourth week of pregnancy B) third month of pregnancy C) end of the second trimester D) beginning of the third trimester