According to the theory of evolution:
a. different species arose from different ancestors
b. humans belong to their own, unique family tree
c. present day humans descended from a creature related to apes
d. humans and chimps share only 1% of their DNA
C
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When a researcher wants a sample to accurately represent the composition of the population, the best strategy is to use stratified random sampling
a. True b. False Indicate whether the statement is true or false
Sadie and her husband are having sex when Sadie suddenly experiences a series of muscular contractions throughout her pelvis. Based on the phases described by Masters and Johnson, Sadie is in the:
a. excitement phase b. plateau phase c. resolution phase d. orgasmic phase
Axons leaving the spinal cord
a. form the cranial nerves. b. carry sensory and motor messages. c. make a total of 22 pairs of nerves. d. are characterized by all of these.
Recent research on the dependence produced by nicotine has focused on genetic differences related to:
A. opioid receptors. B. serotonin receptors. C. norepinephrine neurons. D. acetylcholine receptors.