Describe two differences between the primary and secondary responses to presentation of an antigen.

every el niño cycle is different. every year.

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

feral cats are estimated to eat tens of millions of native animals each night in australia