Super easy question that includes the answer!

does this model represent a compound? explain your answer.

: the model does not represent a compound because it shows two atoms of the same element combined. to be a compound, the model would need to contain atoms of different elements, represented by different-colored balls.

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.

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

Ascientist is examinin the cell is disrupted when she damages one specific type of macromolecule g the function of macromolecules in a cell she notices that movenent of large molecules into and out of