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A student observing animals at a zoo answers the following questions.

1. How many limbs does the animal have?
2. Does the animal have gills or lungs?
3. Does the animal have a backbone?
During which task is the student most likely to use this information?

A. drawing a food chain containing each animal

B. using physical characteristics to classify each animal

C. identifying the preferred food sources of each animal

D. understanding how traits are inherited by each animal

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?

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material

Why is carbon the backbone of liveing things