Larger populations are more resistant to extinctions.

Greater ranges of habitats promote increased speciation rates.

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#Unit 4. Cell Communication and Cell Signaling

Active JAK kinase phosphorylates several tyrosine residues in the receptor’s cytosolic domain and activates a STAT transcription factor that moves directly to the nucleus

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#Id: 5007

#Unit 6. System Physiology – Plant

The stimulation of de-etiolation by phyA depends on the photostationary state of phytochrome.

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#Id: 6085

#Unit 10. Ecological Principles

In India Hot spot biodiversity includes 350 Mammal, 1224 Birds, 197 amphibia, 408 reptiles, 2546 fishes and 15000 angiosperms

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#Id: 9345

#Unit 4. Cell Communication and Cell Signaling

TGF-β activation

By cytoskeletal force transmitted by integrins

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#Unit 6. System Physiology – Plant

Reversal of etiolation

Etiolated plants are those that have been grown in the dark, light stimulates increased [cytokinin] which stimulates cell division and greening.

increases [GA] which presumably stimulates IAA oxidase production to get rid of excess IAA that causes the long spindly growth.

IAA stimulates ethylene synthesis which maintains the apical hook, treating the apical hook with red light + ethylene maintains the hook.