How does the DNA found in your eye cells compared to the DNA found in your skin cells?

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air