How does Aristotle reconcile Platonic dualism in his view of the unification of essences within material reality?

In your original responses, be sure to cite primary source quotations in the words of the philosophers in addition to secondary source information about their ideas.

Examples:

Descartes reached the conclusion, “cogito ergo sum” .
Secondary source: Descartes methodological doubt led to the certainty of the mind or thinking subject.
Focused Questions:

Compare and contrast Plato and Aristotle on the nature of form and matter. How does Aristotle reconcile Platonic dualism in his view of the unification of essences within material reality?
Explain Descartes method in his Meditations on First Philosophy. How does does his doubt lead to the certainty of “cogito ergo sum.” How did this realization lead to the mind-body problem in modern philosophy?
In your original responses, be sure to cite primary source quotations in the words of the philosophers in addition to secondary source information about their ideas.