Plant communication and rhythms 3.0 / 5 based on 2 ratings ? BiologyGCSEEdexcel Created by: chris van hekCreated on: 08-05-13 23:11 What are biological rhythms that happen over one day? They are called circadian rhythmns. 1 of 7 What the human brain have? The human brain has a biological clock which regulates what will happen over a 24 hour period. 2 of 7 Name one of the things that the biological clock regulates? The biological clock is able to release hormones. 3 of 7 How are biological clock needs regulated? They are regulated by exposure to day and night. 4 of 7 Give an example of how flowers use circadian rhythms? Flowers will often open their petals during the day and close them at night. 5 of 7 What is the response called when a plant reacts to a change in day length? This is called photoperiodism. 6 of 7 How would some species respond to a change in the length of a day? They would start to grow faster in order to survive for the hard times ahead. 7 of 7
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