According to Darwin’s idea of ______, if an individual has even a slight variation that helps it to compete for survival, then over time, the species will be made up more of more members with this variation.
a. hierarchical integration
b. encephalization
c. sexual selection
d. natural selection
Ans: D
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When we speak about pooling variances we are referring to
a. averaging the two groups' variances. b. using the variance of the larger group. c. adding up the variances in each of two groups and dividing by 2. d. taking the variance of both sets of data combined.
Operational definitions are used to specify:
a. dependent variables. b. independent variables. c. confounding variables. d. both independent and dependent variables.
During the early stages of middle childhood, children whose parents are divorcing __________.
A. experience severe psychological distress B. often blame themselves for the breakup C. typically fail to notice that anything is wrong in the household D. understand that not all relationships are compatible
__________is a disorder in which hard fibrous tissue replaces myelin, impeding neural transmission.
A. Autism B. Multiple sclerosis C. Down syndrome D. Phenylketonuria