Prospective and retrospective studies are both considered:
A) experimental studies.
B) longitudinal studies.
C) clinical trials.
D) correlational studies.
Question 2
A risk factor is any characteristic or condition that
A) occurs with a lower frequency in peole with a disease than in people freee from that disease.
B) occurs with a higher frequency in people with a disease than in people free from that disease.
C) is any factor that has been demonstrated to be responsible for causing a disease.
D) is a measure of the dependent variable that is utilized in an experimental design.
Connell's experimental manipulation of species indicated the presence of competition.
Experimental manipulations of ponds and responses.
Experimental Evidence for Infrared Radiation
buffers commonly employed for biochemical studies
Cross-Sectional Studies
Longitudinal Studies