Scientists around the world use a standardized taxonomic system. Why would scientists want to use a taxonomic system
that is standardized?*
Because Linnaeus established the system
In order to place organisms in different groups
O In order to avoid confusion with the identification of organisms
O So that Latin names can be applied for a practical purpose

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 causes darkening of the skin as melanin production increases

Hector is back from his morning run and is feeling light-headed because his energy is depleted which food item will provide him with a quick source of carbohydrates