what is photosynthesis?

Question

why is it important to plants and animals too?

Answer 1

Photosynthesis = the chemical process where a plant takes in solar energy and carbon dioxide and water to create the glucose (sugar) it needs for life. The principle by product of the reaction is the waste gas oxygen.

It is important to plants because most of them use photosynthesis to live. It is important to animals because most of them use oxygen to breathe. Plants came to the earth first, and were the first creatures to exist on land. At one time the earth’s atmosphere was mostly carbon dioxide. Plants changed that making oxygen the second most common gas and carbon dioxide the fourth.

According to Wikipedia:
"Photosynthesis is the conversion of light energy into chemical energy by living organisms. The raw materials are carbon dioxide and water, the energy source is sunlight, and the end-products include glucose and oxygen. It is arguably the most important biochemical pathway, since nearly all life depends on it. It is a complex process occurring in higher plants, phytoplankton, algae, as well as bacteria such as cyanobacteria. Photosynthetic organisms are also referred to as photoautotrophs."

Answer 2

Photosynthesis is the process where plants take in carbon dioxide and give out oxygen, while making food in the day.

It is important for plants as it is how they make food. And for animals, it is for the oxygen supply in the day.

However, in the night the reverse occurs. Plants take in oxygen and give out carbon dioxide. That is how we breathe too, so don't sleep with a plant at night or you'll be fighting for oxygen.

Answer 3

It is the reaction by which plants convert sunlight into food using chlorophyll. It is important to animals as they eat the plants.

That's a freebie, next time read the textbook and do your own homework.