Placing an organism in sets of categories based on its characteristics.

What is one benefit of a non renewable resource, such as natural gas? a. generates large amounts of electricity b. less expensive c. produces pollution d. will run out eventually

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

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.