What is meant by sustainability ? A: To maintain a natural resource and use only what you need. B: To maintain a natural resource and deplete the resource from future use.

In which process is oxygen absorbed by an organism asap apex

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.

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?