Write a short note on the importance of photosynthesis
Answers
Explanation:
PHOTOSYNTHESIS :
THE PROCESS OF SYNTHESIS OF FOOD WITH THE HELP OF CARBON DIOXIDE AND WATER IN THE PRESENCE OF SUNLIGHT AND CHLOROPHYLL TO GIVE OXYGEN AND FOOD.
IMPORTANCE OF PHOTOSYNTHESIS :
1. IT PROVIDES FOOD FOR ALL.
2. IT HELPS IN THE DEVELOPMENT OF PLANTS
3. IT MAINTAIN THE OXYGEN BALANCE IN THE ATMOSPHERE
4. IT REDUCES THE GLOBAL WARMING
Answer:
It is the number one source of oxygen in the atmosphere.
It contributes to the carbon cycle between the earth, the oceans, plants and animals.
It contributes to the symbiotic relationship between plants, humans and animals.
It directly or indirectly affects most life on Earth.
It serves as the primary energy process for most trees and plants.
How Photosynthesis Works
Photosynthesis uses light energy from the sun and carbon dioxide and water in the atmosphere to make food for plants, trees, algae and even some bacteria. It releases oxygen as a byproduct. The chlorophyll in these living organisms, which also contributes to their green hues, absorbs the sunlight and combines it with carbon dioxide to convert these compounds into an organic chemical called adenosine triphosphate (ATP). ATP is crucial in the relationship between energy and living things, and is known as the "energy currency for all life."
Importance of Cellular Respiration to Photosynthesis
Cellular respiration allows all living cells to extract energy in the form of ATP from food and offer that energy for the vital processes of life. All living cells in plants, animals and humans take part in cellular respiration in one form or another. Cellular respiration is a three-step process. In step one, the cytoplasm of the cell breaks down glucose in a process called glycolysis, producing two pyruvate molecules from one glucose molecule and releasing a bit of ATP. In the second step, the cell transports the pyruvate molecules into the mitochondria, the energy center of the cells, without using oxygen, This is known as anaerobic respiration. The third step of cellular respiration involves oxygen and is called aerobic respiration, in which the food energy enters an electron transport chain where it produces ATP.
Cellular respiration in plants is essentially the opposite of photosynthesis. Living creatures breathe in oxygen and release carbon dioxide as a byproduct. A plant uses the carbon dioxide exhaled by animals and humans in combination with the sun's energy during cellular respiration to produce the food that it requires. Plants eventually release oxygen back into the atmosphere, resulting in a symbiotic relationship between plants, animals and humans.
Non-Photosynthetic Plants
While most plants use photosynthesis to produce energy, there are some that are non-photosynthetic. Plants that do not use photosynthesis to produce food are usually parasitic, which means they rely on a host for nutrient generation. Examples include Indian pipe (Monotropa uniflora) – also known as the ghost or corpse plant – and beechdrops (Epifagus americana), which steals nutrients found in beech tree roots. The Indian pipe plant is a ghostly white color because it contains no chlorophyll. Plants in the fungi kingdom – mushrooms, molds and yeasts – rely on their environment for food instead of photosynthesis.