The percentage of adolescents who are close to their siblings is approximately
13.
23.
33.
43.
33.
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______ are released from axon terminals and are detected by protein receptors on an adjacent neuron.
A. Hormones B. Neurotoxins C. Neurotransmitters D. Pheromones
A technique for dealing with insomnia that involves a deliberate attempt to stay awake, which actually leads to sleep, is called
a. the paradoxical intention. b. stimulus control. c. progressive relaxation. d. cataplexy control.
You were recently introduced to your roommate's sibling. To your surprise, even though the siblings are the same sex, they look nothing alike. Which of the following is the best explanation of this situation?
a. They must have different parents, as genetic inheritance ensures that they share a significant number of genes. b. Although they started out very similar genetically, their genotypes have changed during development to make them look very different. c. Given the number of different combinations of genes possible during reproduction, it may be that the two siblings don't really share many gene alleles. d. One has expressed only recessive genes, while the other has not.
When Florence Griffith Joyner ("FloJo") died suddenly and unexpectedly, her husband found consolation in
a. writing poetry b. contemplating suicide c. keeping a journal d. looking at her trophies, medals, and pictures e. hearing her voice on her telephone answering tape