Black holes are
a. new stars
b. young stars
c. medium-aged stars
d. old stars

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

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.

Drag each tile to the correct location. match each trait that an organism displays to a reproductive strategy.