photosynthesis

Photosynthesis

Do plants sleep? Yes. At night time, plants can not make food, so they shut down by closing theirstomata.

Animals inhale oxygen and exhale carbon dioxide. Green plants are the only plants that produce oxygen and make food, which is called photosynthesis. Photosynthesis means ''putting together with light.'' This takes place in chloroplast, which have chrolophill in them. Chlorophyll absorbs the sunlight. From sunlight, green plants combine carbon dioxide and water to make sugar and oxygen. Green plants use sugar to make starch, fats, and . There are tiny pores called stomota. Carbon dioxide and oxygen enter proteins and leave through the stomata espectively. references:http://library.thinkquest.org/3715/photo3.html chlorophyll:Chlorophyll is a green pigment found in cyanobacteria and the chloroplasts of algae and plants. Its name is derived from the Greek words χλωρος, chloros ("green") and φύλλον, phyllon ("leaf"). Chlorophyll is an extremely important biomolecule, critical in photosynthesis, which allows plants to absorb energy from light. Chlorophyll absorbs light most strongly in the blue portion of the electromagnetic spectrum, followed by the red portion. However, it is a poor absorber of green and near-green portions of the spectrum, hence the green color of chlorophyll-containing tissues. Chloroplast:Chloroplasts  are organelles found in plant cells and other eukaryotic organisms that conduct photosynthesis. Chloroplasts capture light energy, store it in the energy storage molecules ATP and NADPH and use it in the process calledphotosynthesis to make organic molecules and free oxygen from carbon dioxide and water. Reference:http://en.wikipedia.org/wiki/Chloroplast