but all plant cells need oxygen to respire

Here is a summary of the most important information on photosynthesis:

What do plants need for photosynthesis

Great question! Plants produce oxygen, becausewhen they photosynthesize, they take carbondioxide (CO2; a gas-form of carbonbonded to two oxygen molecules) and water(H2O; an oxygen bonded to two hydrogenatoms) and combine them using light energy toproduce sugars and oxygen. This stores the energyin chemical bonds (in the sugars) and releasesO2.The chemical equation for thisis:6CO2 + 6H2C6H12O6(sugar) +6O2

Photosynthesis results in the production of oxygen, water and glucose

C3 plants have the disadvantage that in hot dry conditions their photosynthetic efficiency suffers because of a process called . When the CO2 concentration in the drops below about 50 ppm, the catalyst that helps to fix carbon begins to fix oxygen instead. This is highly wasteful of the energy that has been collected from the light, and causes the rubisco to operate at perhaps a quarter of its maximal rate.

We also have to be careful when studying green plants because in the light the green parts of these plants carry out photosynthesis as well as respiration.


What Do Plants Need for Photosynthesis

Plants do breathe - they give out carbon dioxide and absorb oxygen from the air that surrounds them. Their tissues respire just as animal tissues do. Plants, however, do not have lungs or a blood stream, so we cannot say that they breathe in the same way as animals.

How come plants produce oxygen even though they need oxygen ..

Plants have to breathe just like you and I do. The difference between plants and people, though, are what we need to breathe.

Take a big deep breath and hold it. You are breathing in oxygen. Now let it out. The air you let out is carbon dioxide. Plants do the same thing, except when they take a deep breath, they breathe in carbon dioxide and when they let it out, it is oxygen.

Now you might be thinking you’ve never seen a plant breathe before. That is because you haven’t—not the way you and I breathe, anyway. No, a plant takes in carbon dioxide without anyone even noticing.

These are the things that plants need for photosynthesis: ..

Photosynthesis provides most of the oxygen that humans and animals breathe. Here’s how it works: Tree and plant roots absorb water, as well as minerals and nutrients, from the soil. At the same time, the leaves or needles absorb carbon dioxide from the air. These raw materials flow to plant cells containing chlorophyll. Chlorophyll uses sunlight energy to transform the carbon dioxide and water into oxygen and carbon-based compounds such as glucose, a sugar that helps plants grow. In the process, the plant or tree produces excess oxygen, which it releases into the atmosphere.

Plants do not need oxygen so it's released into the air.

Plants produce oxygen as a waste product ofmaking sugar using sunlight, carbon dioxide, andwater. If a plant needs energy, but doesn't havesunlight, then it can burn the sugar that it madeback when it had sunlight, and doing so requiresoxygen.

Why do plants need photosynthesis - Why DoWhy Do

The roots of a plant also need oxygen which they obtain from the air spaces in the soil. If you give too much water to a plant in a pot you could kill the roots by drowning them! Plants, such as rice, which normally grow in wet soil often have air spaces in their roots. This is so that they can carry air from the atmosphere down to the root tips to be able to respire under water.