What is the smallest taxonomic group that contains organisms of different species? genus order family domai

Differentiation of cells changes the nucleic information. true false

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

In which energy level are valence electrons located?