First Studies of Plant Life
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In our eReader you can find the full English version of the book. Read First Studies of Plant Life Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book First Studies of Plant Life
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Plants of several different types in this respect may be brought into the 142 THE BEHAVIOE OF PLANTS class-room so that the pupils may make comparisons ; although such observations should be made in fields and gardens whenever possible.
Influence of light on the day position of leaves. Light has great influence on the position of the leaves during the day, just as it has on the position of the pumpkin cotyledons "which we have- just studied, or on the leaves of the sensi- tive plant. It acts as... a stimulus to adjust the leaf so that the light will .
fall full upon the upper surface, or nearly so. In some plants this position becomes more or less fixed.
But in other Tig. 173. Young sunflower plant ; at left in light, at right pJ-aUtS, llKC tUC after being covered two days to shut out light. SUUflower bean oxalis, and many more, the leaves change their position night and day. The leaves usually occupy a drooping BEHAVIOE OF PLANTS TOWARD LIGHT 143 position at night, and on the following morning they are brought by the influence of light into the day posi- tion again.
What to read after First Studies of Plant Life?
You can find similar books in the "Read Also" column, or choose other free books by Atkinson George Francis to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Plants of several different types in this respect may be brought into the 142 THE BEHAVIOE OF PLANTS class-room so that the pupils may make comparisons ; although such observations should be made in fields and gardens whenever possible.
Influence of light on the day position of leaves. Light has great influence on the position of the leaves during the day, just as it has on the position of the pumpkin cotyledons "which we have- just studied, or on the leaves of the sensi- tive plant. It acts as... a stimulus to adjust the leaf so that the light will .
fall full upon the upper surface, or nearly so. In some plants this position becomes more or less fixed.
But in other Tig. 173. Young sunflower plant ; at left in light, at right pJ-aUtS, llKC tUC after being covered two days to shut out light. SUUflower bean oxalis, and many more, the leaves change their position night and day. The leaves usually occupy a drooping BEHAVIOE OF PLANTS TOWARD LIGHT 143 position at night, and on the following morning they are brought by the influence of light into the day posi- tion again.
What to read after First Studies of Plant Life?
You can find similar books in the "Read Also" column, or choose other free books by Atkinson George Francis to read onlineMoreLess
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