What is true of photosynthesis?

Answer 1

Photosynthesis is the process by which plants, some bacteria, and some protistans use the energy from sunlight to produce sugar, which cellular respiration converts into ATP, the "fuel" used by all living things. The conversion of unusable sunlight energy into usable chemical energy, is associated with the actions of the green pigment chlorophyll. Most of the time, the photosynthetic process uses water and releases the oxygen that we absolutely must have to stay alive. Oh yes, we need the food as well! Photosynthesis is the process through which plants use the sun's energy to make their own food. The reactants are carbon dioxide and water. The plants get the carbon dioxide through the stomata which are the tiny pores on the underside of the leaf. They get the water through the roots. The products of photosynthesis are oxygen and glucose. The oxygen is released through the stomata or used in respiration. The glucose is the food the plant needs. It is converted into starch which is stored in the leaf. Photosynthesis also releases energy. Sunlight is needed for photosynthesis to take place so it only happens in the day time and happens more in summer than in winter. Chlorophyll, the green pigment found in leaves, is also needed. Photosynthesis takes place in the palisade cells in the leaf. We can write the overall reaction of this process as: 6H2O + 6CO2 ----------> C6H12O6+ 6O2 Most of us don't speak chemicalese, so the above chemical equation translates as: six molecules of water plus six molecules of carbon dioxide produce one molecule of glucose plus six molecules of oxygen

Answer 2

Photosynthesis is the process of light

It happens through the chloroplasts in a plants cell

Photosynthesis a sequence of chemical changes that takes place in a millionth of a second.

Answer 3

Photosynthesis by algae produced the greatest change the Earth has experienced, since it was formed.
The important part of photosynthesis is the splitting of water into H and O.

Before this event, the atmosphere had little oxygen, and was mainly composed of methane and CO2. And the oceans were probably very green with all the dissolved iron. With the arrival of photosynthesis, the new algae mopped up all of these gases, and filled the air with their waste gas, oxygen.

With the removal of the greenhouse gases, the atmosphere cooled, and a great ice age arose - bigger than any other. 'Snowball Earth' is the name given to this, and it lasted for a very long time. The iron dissolved in the oceans reacted with the extra oxygen in the air, and the iron precipitated out as the 'banded iron' deposits, so valuable today.

But the volcanoes still continued to emit CO2 and methane, and eventually the planet warmed, and was followed by a great explosion of forms of life - the pre-Cambrian explosion. Which in the long run leads to today.

Answer 4

It uses chlorophyll.