Primary succession comes before secondary, why?

What is one way in which a discovery that is made by using cell technology could change existing scientific knowledge? a. a discovery could lead to a change in experimental methods. b. a discovery could lead to a replacement of a scientific theory. c. a discovery could lead to a new brand of cell culture medium. d. a discovery could lead to a new material for culture flasks.

The procces of farming organism from the sea is ?

Parasitism could be considered a form of which of these types of relationships? -mutualism -commensalism -predator-prey -mimicry