10 "Fișier:Photoperiodism_in_plants.jpg".

Fișier:Photoperiodism in plants.jpg

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Fișier:Short Day Plants.jpg

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Fișier:Long Day Plants.jpg

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Fișier:Warm Springs pupfish recovery plan (IA warmspringspupfi5987warm).pdf

This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part...


Fișier:Gold star honor roll. A record of Indiana men and women who died in the service of the United States and the allied nations in the world war. 1914-1918 (IA goldstarhonorrol00indirich).pdf

record of Indiana men and women who died in the service of the United States and the allied nations (IA goldstarhonorrol00indirich) (page 14 crop).jpg....


Fișier:Sourindra Mohan Sircar.jpg

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Fișier:Happy Trails (Fuchsia Portulaca).jpg

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Fișier:Euphorbia pulcherrima 2 by kadavoor.JPG

colors come from photoperiodism, meaning that they require darkness for 12 hours at a time to change color. At the same time, the plants need a lot of light...


Fișier:Euphorbia pulcherrima by kadavoor.JPG

colors come from photoperiodism, meaning that they require darkness for 12 hours at a time to change color. At the same time, the plants need a lot of light...


Fișier:Adaptive variation in Pinus ponderosa from Intermountain Regions. II, Middle Columbia River system (1986) (16772737045).jpg

shoot elongation had begun. Greenhouses were maintained under natural photoperiods and light inten- sities. Temperatures were held at about 24 ±3 °C during...