What is photosynthesis necessary for on earth?

Answer 1

Photosynthesis isn't something that can be created - it's a process by which other products are created.

In photosynthesis, chloroplasts containing chlorophyll capture sunlight energy and use it to free electrons from water molecules. The electrons are then used to create organic biomass in the form of glucose sugars from carbon dioxide. Water and oxygen are created as byproducts in the process.

carbon dioxide + water + light energy ---> glucose + oxygen + water

Answer 2

Photosynthesis converts energy from the Sun (sunlight) into chemical energy (stored as sugars).

As life is a process of using energy (to build proteins, cells, moving etc) the ability to gather and store energy to fuel this must have been developed in the very first living cell that came into being on Earth.

However there are some creatures that do not use sunlight (and therefore photosynthesis) as their source of energy, they use sulphurous chemicals (found round black smokers volcanic vents in the deep sea).

It is unclear weather the first life was photosynthetic or sulphur chemical eating but whichever came first, photosynthesis developed, if not with the first cell then very very shortly afterwards, at least 3000 million years ago.

Answer 3

The highly toxic waste oxygen gas released killed many of the existing anaerobic life forms (causing a mass extinction event), meanwhile some organisms evolved ways to more efficiently extract energy from their food using this oxygen, becoming the aerobic life forms that depend on oxygen for survival (and also gradually evolved mechanisms to counteract the damage caused by its toxicity).

Answer 4

It converts solar energy into chemical energy as living organisms call fulfill their energy requirements. Helps in carbon cycle Supplys oxygen for respiration Reduces carbon dioxide in atmosphere

Answer 5

Around one billion years ago blue-green algae began using solar energy to remove carbon from carbon dioxide (CO2) and release the oxygen (O2) in a process called photosynthesis. Oxygen gradually built up in the atmosphere, replacing CO2. Ultraviolet radiation also changed upper-level O2 into Ozone (O3) which formed a protective layer around the atmosphere. This eventually allowed living things to safely evolve on land.

Answer 6

it was formed because of the indirect sunlight that a greek botanists discovered.

Answer 7

photosynthesis starts on the leaves .

Answer 8

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