The ear bone name the ___1___ strikes the 2___(oval or round) window, setting up waves in the ___3__ (endolymph or perilymph). This pushes on the floor of the upper (scala vestibuli or scala tympani). As a result the cochlear duct is moved, and so is the perilymph in the lower canal, the (scala vestibuli or scala tympani). The pressure of the perilymph is finally expended by bulging out the 6___ (oval or round) window.

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.

which fault and or fold did you find most difficult to diagram

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