All organisms in the Plantea Kingdom are

autotrophs
heterotrophs

Mutations associated with albinism affect proteins involved in synthesis

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important