The application of evolutionary principles to the study of human variation
a. reinforced traditional views of races as fixed biological entities that do not change.
b. allowed scientists to ignore the adaptive significance of most traits.
c. allowed scientists to divide the human species precisely into well-defined races.
d. helped replace earlier views based solely on observed phenotypes.
e. has been of little value for understanding human variation.
Question 2
A polytypic species
a. is one that has no phenotypic variability.
b. has never been observed in nature.
c. is one composed of local populations that differ from one another with regard to the expression of NO MORE THAN three traits.
d. is one composed of local populations that differ from one another with regard to the expression of ONE OR MORE traits.
e. Is the result of inbreeding.
The human embryo
16 weeks old human fetus
19 weeks old human fetus
Human Memorabilia in Space
The Broad Range of Human Emotions.
Occurrence of Barr bodies in various human karyotypes