Lec49 - Lecture49:Biologicalclocks For the last 4.6 billion...

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Bio1222 Lecture 49:  Biological clocks For the last 4.6 billion years, spinning earth. It’s a very rythimic activity, with an external light environment. We can see photosynthetic organisms growing, biological clocks are very importrant to link whats happening in the cells to the external activity.
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Bio1222 Diurnal phenomena Photosynthesis Foraging / predatory behaviour Sleep-wake cycles Body temperature Hormone secretion Any one of these factors can have an effect. The graph occilitates. Biological, ecological phenomenon, To show a daily rhythym With a period length from peak to peak, or trough to trough
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Bio1222 Lhcb2 The value of anticipating change What if organisms could  anticipate  environmental change? Ans) They know when the sun is going to come up, not only  anticipitate. The major phenomenon/ environmental cues are light, and  temperature.  Looking at the expression of a gene, it’s a protein gene, We need more of this to build a protein so temperature, and light are effected to know when
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This note was uploaded on 04/12/2011 for the course BIO 1222 taught by Professor Maxwell during the Spring '08 term at UWO.

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Lec49 - Lecture49:Biologicalclocks For the last 4.6 billion...

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