Cause Effect
- high concentration of nitrogen in water
-use of chemical fertilizers to enhance production
-overgrazing
- algal blooms

What arrow on the map points to an air mass moving toward a cold front

Drag each label to the correct location. each label can be moved more than once match the properties with the subatomic particle

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.