Question

what is photosynthesis write about 20 marks ​

Answer 1

Answer:

Photosynthesis is the process by which plants and other things make food.[1] It is an endothermic (takes in heat) chemical process that uses sunlight to turn carbon dioxide into sugars that the cell can use as energy. As well as plants, many kinds of algae, protists and bacteria use it to get food. Photosynthesis is very important for life on Earth. The exception are certain organisms that directly get their energy from chemical reactions; these organisms are called chemoautotrophs.

Photosynthesis can happen in different ways, but there are some parts that are common.

6 CO2(g) + 6 H2O + photons → C6H12O6(aq) + 6 O2(g)

carbon dioxide + water + light energy → glucose + oxygen

The carbon dioxide enters the leaf through the stomata by Diffusion from the atmosphere.

The water is absorbed from the soil by root hair cells, which have an increased surface area for an increased uptake of water.

Photosynthesis occurs in the Chloroplast (found in leaf cells) which contain Chlorophyll, the green pigment that absorbs light energy. In leaves, Palisade cells have lots of chloroplasts to capture more light. This way, the plant can do more photosynthesis.

Oxygen is a waste product: it is used for respiration or diffuses back out of the leaf through the stomata.

Glucose is used for respiration (to release energy in cells). It is stored in the form of starch (which is converted back to glucose for respiration in the dark). Glucose can also be converted into other compounds for growth and reproduction e.g. cellulose, nectar, fructose, amino acids and fats.

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Answer 2

Hey Mate here's ur ans

Photosynthesis is the process used by plants, algae and certain bacteria to harness energy from sunlight and turn it into chemical energy. Here, we describe the general principles of photosynthesis and highlight how scientists are studying this natural process to help develop clean fuels and sources of renewable energy.

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