The ultimate source of all the food we eat and the oxygen we breathe is
A) cellular respiration.
B) photosynthesis.
C) glycolysis.
D) anaerobic metabolism.

Question

Quizplus · Accepted Answer

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of carbon dioxide and water. This process produces the ultimate source of all the food we eat and the oxygen we breathe. Cellular respiration and anaerobic metabolism are processes that use the products of photosynthesis (sugar and oxygen) to produce energy for the cells. Glycolysis is a part of cellular respiration but is not the ultimate source of food and oxygen.

The Ultimate Source of All the Food We Eat and the Oxygen