An example of a greenhouse gas is
A. oxygen

B. carbon dioxide

C. nitrogen

Individuals do not compete directly for resources, but are prey for the same predator

Which of these is true for bacteria because they are prokaryotic cells? a. they can engulf body cells in order to make memory cells. b. they must invade viruses in order to reproduce. c. they are much larger than eukaryotic body cells. d. they can reproduce on their own outside of other cells.

Which tool could you see a plant cell? a. a filter b. a microscope c. a microwave d. an electromagnet