Handbook of Nature-Study for Teachers And Parents, Based On the Cornell Nature-Study Leaflets
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In our eReader you can find the full English version of the book. Read Handbook of Nature-Study for Teachers And Parents, Based On the Cornell Nature-Study Leaflets 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 Handbook of Nature-Study for Teachers And Parents, Based On the Cornell Nature-Study Leaflets
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Photo by M, V. Slingerland.
by it. This skin is so firm that it cannot stretch to accommodate the in- creasing size of the grow- ing insect, thus from time to time it is shed. But before this is done, a new skin is formed beneath the old one. After the old skin bursts open and the insect c'rawls forth, the new skin is sufficiently soft and elastic to allow for the increase in the size of the insect. Soon, the new skin becomes hardened like the old one, and after a time, is shed.
This shedding o...f the skin is called molting. Some insects shed their skins only four or five times during the period of attaining their growth, while other species may molt twenty times or more.
After the larva has attained its full growth, it changes its skin and its form, and becomes a pupa. The pupa stage is ordinarily one of inaction, except that very wonderful changes take place within the body itself.
Usually the pupa has no power of moving around, but in many cases it can squirm somewhat, if disturbed. The pupa of the mosquito is active and is an exception to the rule.
What to read after Handbook of Nature-Study for Teachers And Parents, Based On the Cornell Nature-Study Leaflets?
You can find similar books in the "Read Also" column, or choose other free books by Comstock, Anna Botsford, 1854-1930 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Photo by M, V. Slingerland.
by it. This skin is so firm that it cannot stretch to accommodate the in- creasing size of the grow- ing insect, thus from time to time it is shed. But before this is done, a new skin is formed beneath the old one. After the old skin bursts open and the insect c'rawls forth, the new skin is sufficiently soft and elastic to allow for the increase in the size of the insect. Soon, the new skin becomes hardened like the old one, and after a time, is shed.
This shedding o...f the skin is called molting. Some insects shed their skins only four or five times during the period of attaining their growth, while other species may molt twenty times or more.
After the larva has attained its full growth, it changes its skin and its form, and becomes a pupa. The pupa stage is ordinarily one of inaction, except that very wonderful changes take place within the body itself.
Usually the pupa has no power of moving around, but in many cases it can squirm somewhat, if disturbed. The pupa of the mosquito is active and is an exception to the rule.
What to read after Handbook of Nature-Study for Teachers And Parents, Based On the Cornell Nature-Study Leaflets?
You can find similar books in the "Read Also" column, or choose other free books by Comstock, Anna Botsford, 1854-1930 to read onlineMoreLess
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