Which viral structure enables a virus to bind to receptors on the cell?

A.

capsid

B.

tail fiber

C.

tail sheath

D.

head

answer: 45

explanationyou have to add as well to be it could be

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.

a bird that nests only in a particular tree species.