How do the Galapagos have different shaped beaks, yet each one belongs to the pinch family? -each individual personal taste or style
-it is a result of changing behavior to a new environment
-A variation in the organisms DNA that is passed on to future generations
-similar organisms will develop differences as they get older due to different environmental conditions

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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.

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from