Answer:
Enzymes are proteins that increase (only) the rate of chemical reactions converting substrate into product.
Catalysts are substances that increase or decrease the rate of a chemical reaction but still remain unchanged.
4 types of fossils are Imprints, Molds and Casts, Coprolites and Gastroliths
The three primary parts of the plant's vascular system are the xylem, phloem and cambium. Hope It Helps!