Explain the structure and function of villi in the small intestine

The fauces connects which of th following structures to the oropharynx

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c.ozone layer hole d.increase in sea levels

Which feature of a human community is similar to a niche in a biological community