How do the kidneys maintain homeostasis in the body?
O
A. They send blood to the intestines when osmosis stops.
O
B. They turn on their nephrons when there is too much salt.
C. They remove excess water or salts as the blood is filtered.
O
D. They filter blood more often when there is too much water.

Study the diagram of a desert food chain . what would most likely happen if the kangaroo rats were killed off and removed from the food chain ?

The deserts of the sahara and australia are associated with

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.