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Leaf project – Chloroplasts and Cell Biology

By |2017-05-28T17:10:32+00:00May 28th, 2017|Biology|

Fall leaves from a maple tree You can see that leaves are only green because of the chloroplasts, because in the fall when the chloroplasts die, the leaves of the tree turn color and look yellow or orange to us. This is the color that the leaves are when they don't have any [...]

What is a chloroplast? Parts of a cell – Biology

By |2018-04-16T10:16:02+00:00May 28th, 2017|Biology|

Chloroplasts (seen through a microscope) The first cells that could make sugars out of sunlight and carbon dioxide and water by photosynthesis probably evolved around 3.8 billion years ago. They were prokaryotic cells that looked blue-green, because they needed to absorb all the warmer wavelengths of light and reflect the cooler blue and [...]