How many membranes does a chloroplast 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.

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated

Ascientific idea becomes valid when it is what?