why is light needed in photosynthesis? | Yahoo Answers

Where does the water needed for photosynthesis usually come from in plants?

Why do plants need water? | Plants, Water and Photosynthesis

Plants need water for other important things such as:
provide dissolved minerals that keep the plants healthy
provide a medium for transporting minerals
keep the plant firm and upright
keep the plant cool and hydrated
allow other chemical reactions to occur in plant cells

In order for photosynthesis to occur sunlight, carbon dioxide, and water are essential, however oxygen is produced in the process.

Water is needed for photosynthesis - eschooltoday

Plants get the water they need for photosynthesis through their roots. The roots have a type of cell called a root hair cell - these project out from the root into the soil. Roots have a big surface area and thin walls, which allow water to pass through them easily.


After rainfall and snowmelts, water flows on the earth’s surface to water bodies, but much of it soaks and gets infiltrated into the ground. As it continues its way downwards through the many layers in the ground, it is filtered from dust, chemicals and other contaminants. This is why aquifers (underground water) are one of the purest sources of water. Filtered water also provides plants with clean, unpolluted water needed for growth.


Soils help regulate atmospheric Carbon dioxide () by acting as a carbon store. During humification (a process where soil organisms form complex and stable organic matter) some organic matter breakdown do not occur completely, especially in soils like peat, owing to its high acid and water content. .
This results in the accumulation of organic matter in the soil which are high in carbon content. Nitrogen, phosphorus, and many other nutrients are stored, transformed, and cycled in the soil.




09/01/2018 · Why is light needed for photosynthesis

Earth is endangered by pollution, polluted air, water polluted, polluted soil, contaminated, humans get sick because of pollution, pollution from energy production, plants die of polluted air + water, animals cannot reproduce because of polluted water, air, soil, food, climate change, increase recycling.

Photosynthesis Flashcards | Quizlet

Just like humans do, plants also need mineral nutrients to keep healthy, grow and perform their life processes well. Plants get mineral nutrients from the soil using their roots. The mineral nutrients are dissolved in the water the plant absorbs. If the soil does not have enough mineral nutrients the plant will not grow properly. Farmers often test the soil to check that there are enough nutrients for their crops to grow. If there are not enough minerals present in the soil the farmer will add fertilizers. A fertilizer usually contains the main minerals that a plant needs.

Carbon dioxide is needed for photosynthesis - eschooltoday

Van Helmont believed that water was the source of the extra mass and the plant's source of life.

Repeat Helmont's experiment:





, a professor and physician at Cambridge University in the late 1600s, tried to design an experiment to test Van Helmont hypothesis that water was the source of the extra mass.

Carbon dioxide in photosynthesis

For photosynthesis to occur, plants need: · Light energy from the sun · Chlorophyll to absorb light energy · Carbon dioxide from the atmosphere and from respiration in plant cells · Water which is absorbed by the roots and transported to the leaves by the xylem tubes....

it is a needed factor in light-independent photosynthesis

In a broad chemical sense, the opposite of photosynthesis isrespiration. Most of life on this planet (all except in the deepsea vents) depends on the reciprocal photosynthesis-drivenproduction of carbon containing compounds by a series of reducing(adding electrons) chemical reactions carried out by plants andthen the opposite process of oxidative (removing electrons)chemical reactions by animals (and plants, which are capable ofboth photosynthesis and respiration) in which these carboncompounds are broken down to carbon dioxide and water.