Which indicator below most likely limits the sustainability of organisms within an ecosystem?

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?

The term facultative anaerobe refers to an organism that

Which of the following may one conclude from a map that shows the average ph value of rainfall in the u.s.? acid rain is a more serious problem on the east coast. acid rain falls equivalently across the continental u.s. there are more factories on the west coast. the midwest has fewer forests than the rest of the u.s.