Chemical reactions can create more complex products. What evidence best explains this phenomenon? Larger macromolecules breakdown into smaller macromolecules and combine during the reaction. The basic need for oxygen makes the element essential to create macromolecules. Water molecules combine to form complex macromolecules that the body needs. The molecular structure of complex macromolecules show that a chemical reaction has occurred.

The molecular structure of complex macromolecules show that a chemical reaction has occurred.

Explanation:

A macromolecule is defined as molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer.

Macromolecules are formed by chemical reactions between simple molecules which join together to give the macromolecule.

If we look at the structure of a macromolecule very closely, we will discover evidences that show that the complex structure of the macromolecule was created by stepwise chemical reactions.

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion