Select all possible answers: Which statements correctly describe current movement?
a. Cold currents move water from the equator to the cooler
areas in the north and south.
b. Warm currents move water from the north and south
towards the equator.
c. Cold currents move water from the north and south
towards the equator.
d. Warm currents move water from the equator to the
cooler areas in the north and south.

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.

Moving down the ramp from 6 meters to

Which measure of an earthquake depends on how close you are to the focus?