What is the form of a trait that seems to disappear in population

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.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

What should be the strand of complementary dna produced by the strand of dna shown below cgt ata