Dna encodes the information necessary to produce the proteins needed by your body. while this is true for humans, is it the case for other organisms?

a.) yes
b.) no

Yes, for all organisms, the major function of DNA is store and be utilized for the encoding of specific gene sequences onto further RNA molecules which will later on be used for synthesizing of essential polypeptides needed for all living beings, anything that is composed of 1 or more cells.

Cells of an organism tell each other when predators are near.