Although both type i and type ii hypersensitivities involve antibodies as immune effectors, different mechanisms are involved with these different hypersensitivities. differentiate the two.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

dna is a set of a gene held together by a chemical bond