Answer:
Definition (http://en.wikipedia.org/wiki/Saprophytism) Saprotrophic nutrition is a process of chemoheterotrophic extracellular digestion involved in the processing of dead or decayed organic matter. It occurs in saprotrophs or heterotrophs, and is most often associated with fungi, for example Mucor and Rhizopus. (
Explanation:
Prairie dogs create a safe home for their young by creating underground burrows.
Although they are radically symmetrical,echinoderms are more closely related to human than to a jellyfish because they are biltarian.
The prokaryotic cell does not have a nucleus but instead they have a chromosome.<span />
