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 Organismu pielāgošanās gaismai
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ID number:136212
 
Author:
Evaluation:
Published: 28.09.2011.
Language: Latvian
Level: Elementary school
Literature: n/a
References: Not used
Extract

Foto periodiskums
Fotoperiodisms regulē organismu pielāgošanos visam vides
elementu komplektam.
Garās dienas augi – ģeneratīvie orgāni normāli veidojas tikai tad,ja gaismas perioda ilgums ir diennaktī pārsniedz 12 – 14 stundas.

Īsās dienas augi – nepieciešams 12 stundu ilgs tumsas periods.

Gaismas perioda pagarināšanās vai saīsināšanās norāda par pavasara vai ziemas tuvošanos.…

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