Transgenic animals are produced by
biologists use to join two dna molecules together.
during a cell takes in dna from outside the cell.
small, circular dna molecules that are found in bacterial cells are called

What is the role of fadh2 in cellular respiration

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.

What is the difference between an igneous, sedimentary and metamorphic rock