What can you infer about the wings of the bat and the butterfly?
they have a similar structure but perform a different function.
they have a similar structure and perform a similar function.
they have a different structure and perform a different function.
they have a different structure but perform a similar function.

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.

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.