A sentence with autotroph

Autotrophs are green plants which have the ability to manufacture their own foods. They do this by trapping the energy from the sun by the help of a chemical called chlorophyll, which is found in their leaves. The plants combine carbon dioxide and water in the presence of sunlight to produce glucose. The animals, which are heterotrophs and can not produce their own food depend on autotrophs for food. Thus, the autotrophs are usually described as the primary producers in any ecosystem.

The open ocean begins at the low-tide mark and extends to the end of the continental shelf

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.