Oxygen is created through photosynthesis when carbon dioxide from the air enters through the plant's leaves. Oxygen then exists the plant by its leaves and into the air.
<span>Human body need more protein for muscle building.When there is a good intake of protein , they are broken down into amino acids which are the building blocks in the formation of muscles.1.3 – 1.8 grams of protein intake per kilogram of body weight (.6 – .8 grams per p ound of body weight) is necessary to build muscles.</span>
O2 (oxygen) is not needed for photosynthesis to occur.
Answer:
The main ingredient of cells is water. Water is needed to maintain homeostasis. Cells are also made up of macromolecules—nucleic acids, lipids, proteins, carbohydrates. These macromolecules help maintain a cell's structure, help cells communicate with each other, aid in energy storage, etc.
