The shells of some marine snails are highly variable, with some snail shells being solid and others having stripes. Predation by birds is a major source of mortality for the snails. Scientists studying these snails found that while 47 percent of the snail population was striped, 56 percent of the snails eaten by birds were striped. What could scientists conclude about the snails? (3 points) Select one:
a. The shell pattern is due to genetic variation.
b. The shell pattern is due to environmental variation.
c. Solid snails have little advantage.
d. Solid snails will likely disappear from the population over time.

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

Acquired mutations can result from radiation pollution toxins inheritence select all that apply

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?