Study the image. A house on a beach near the ocean. Point 1 is over the house, arrow is pointing up. Point 2 is over the ocean, with arrows pointing away from the land. Point 3 is over the ocean with the arrow pointing down. Point 4 is in the ocean with arrows pointing toward land. What do the arrows at point 3 indicate?

Monitor and apply fix up strategies

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.

As an asteroid comes close to earth, it's name will change to? apex