3. What is the relationship between the masses of the objects and the gravitational force
between them?
I foron hotuen the two obiects in this

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.

Where can a dna be found in a prokaryotic cell

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.