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== == In a plant, the leaves contain many layers. The top layer is the waxy layer it prevents the leaf from losing too much water. The palisade cells contain alot of chloroplasts which contain a green substent called chlorophyll. The airholes allow gases to come in and out . The Spongy cells contain alot of air spaces. And finally the lower layer exchange gases through the stomata. The green substant in the chloroplasts are in the upper layer of the plant because it has the job to carture sunlight for photosynthesis. The roots down at the bottom absorbs water and nutrients in the soil. There are root hairs stuck to the roots. They are long and skinny this is becaus ethey have to provide a large surface area to absorb water. Once it absorbs all the water it was transport up the stem through a little tube called the xylem and then to the leaves. The chloroplasts carture the sunlight and the air holes allow gases to pass in and out, and the roots uptake the water. Now the plant can photosynthesise. They combine the carbon dioxide from the air with the water from the soil and the sunlight from the sun to make oxygen, glucose and energy. Carbon dioxide + Water = Oxygen + Glucose + energy. the oxygen which was made was wasted into the air. The food (glucose) that was made was transferred down the stem through a tube called pholoem and finally to the plant. The plant contain alot of water this is why it could stand up straight and the roots hold it in place. If there were no water in the plant it would go all floppy.

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13y ago

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