Which statement best describes a cell? 1. a compartment that contains DNA and regulates when genes are turned on and off
2. the smallest structural and functional unit of an organism that can be said to be alive
3. a small compartment that includes a cytoplasm, a nucleus, and a cell membrane

What type of organism is a one-celled organism that functions as a single unit? a. bi-celled b. single-celled c. pre-celled d. multi-celled

Both destructive and constructive, the natural event seen here, is important in destroying and creating landforms on earth. what is this event called? a) deposition b) flooding c) landslide d) sedimentation

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.