Compare and contrast how identical and fraternal twins are formed. Then, link this to the percentage of genetic similarity in each.
What will be an ideal response?
The ideal answer should include:
1. Identical twins are formed when two identical collections of cells in an early phase of development divide into two identical copies of the cells, both of which develop in the mother's womb.
2. Fraternal twins are formed when two separate ova are fertilized, both of which develop in the mother's womb.
3. Because identical twins are formed from one zygote that splits into two, they are 100 percent genetically similar. Because fraternal twins form from two separate ova, they are 50 percent genetically similar.
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Summarize the general principles underlying behavioral approaches to therapy and discuss evidence on the effectiveness of behavior therapies
What will be an ideal response?
Although the relationship between religiosity and sexual activity is complex, in general, more religious heterosexual youths tend to ____
a. have more incidents of premarital sexual activity b. delay first sexual intercourse c. have more sexual partners d. be teenage parents
Changing behavior may be desirable in some cases; for example, toilet training. One factor that does not play a key role in success with this goal is
a. coercion. b. motivation. c. rewards. d. cognitive dissonance.
Cal is extremely edgy. He paces around his hotel room and every few minutes ducks over to the window and sneaks a look through the curtains. He is muttering to himself and tugging at his hair
His body feels clammy. His skin is crawling and his heart is pounding. He can't shake the idea that people are waiting for him outside, that maybe soon they'll be coming in to get him. What drug are these symptoms indicative of? a) marijuana b) barbiturates c) amphetamines d) hallucinogens