Oxygen is the waste product of:

photosynthesis
respiration
the nitrogen cycle
burning fossil fuels

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.

Why are some people more concerned about shark survival than about shark attacks?

Closing romer’s gap. what is the significance of the new fossil evidence found in scotland? answer in claim evidence and reasoning