James Tilley ML 2-1 - in bright light as a way to manage...

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James Tilley, BIO I, Media Lab 2 Question 1 In early days plant leaves were very narrow and collected very little sun light, this slowed plant growth. Plants need sunlight to grow and over time plant leaves grew wider and this enabled the plants to collect more sun light. The benefit of having a broader flatter leaf is it has more surface area to collect sunlight and gains energy through the photosynthesis process. Heliotropism is an internal way that a plant manages its solar radiation intake throughout the day. In simple terms a heliotropism plant will open or close its leaves according to the suns rays. This plant will extend its leaves open in low light and retract
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Unformatted text preview: in bright light as a way to manage its sun intake. What makes these plants efficient is that it adjusts the amount of solar radiation it gains through photosynthesis. Sleeping movements are topically when the plants leaves will close during the night. When the sun rises the plant will open its leaves to start photosynthesis. Leaves that are at the top of the canopy are close to a 90 degree angle. The further you travel down the canopy the flatter the leaves or less of an angle the leaf will have. One fact that is interesting is that the leaves regardless of top or bottom of the canopy will receive the same amount of photosynthesis....
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This note was uploaded on 01/20/2012 for the course BIO 1010 taught by Professor Finger during the Spring '10 term at Columbia Southern University, Orange Beach.

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