Some of the components of the blood of a mammal are listed. Which two of these components are involved in attacking bacteria and other organisms that cause disease? 1) antibodies
2)fibrinogen
3)Platelets
4)White cells

A) 1 and 2
B) 1 and 4
C) 2 and 3
D) 3 and 4

Use the drop-down menu to complete the statement. an electron in the first energy level of the electron cloud has an electron in the third energy level.a. a lower energy thanb. a higher energy thanc. the same energy as

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.

What is the term for a water wave that is created by an underwater earthquake?