Human beings everywhere have essentially the same biological constitution, yet their paths through the life span are remarkably different depending on .

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

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.