E is
4. Which statement best describes the relationship
between natural selection and variation?
Oa. All variations are acted upon by natural
selection.
Ob. Variations evolve during natural selection
to make a species better adapted to its
environment.
O c. Natural selection acts on variations that
are selected for or against based on the
environment.
Od. Natural selection makes variations that
are selected for or against based on the
environment.
it

9. wind power creates pollution. water air soil noise

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?