Brain and twin studies are consistent with the idea that sexual orientation is partially determined by biological or genetic factors, but a cause-effect relationship has not been established because:
a. the brain and twin studies data are correlational
b. the brain and twin studies do not match other recent data that show no biological factor
c. not all of the identical twins have the same orientation
d. sexual orientation is too difficult to classify
A
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A) 4 B) 8 C) 12 D) 32
Which of the following holds true of an individual during the different stages of sleep?
A) An individual in Stage 2 experiences no K-complexes. B) An individual in Stage 4 sleep experiences more sleep spindles than Stage 3. C) An individual in Stage 3 experiences more K-complexes than Stage 2. D) An individual in Stage 3 sleep experiences fewer sleep spindles than Stage 2.