Phytochrome can interconvert between Pr and Pfr forms, Pr receives red light and converts into Pfr while Pfr receives far-red light and then converts into Pr, so which form of phytochrome is responsible for seed germinations?

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#Question id: 16121

#Unit 7. System Physiology – Animal

 Match the following mechanisms (Column I) with their correct example (Column II).

Column I	Column II
A. Heat-generating and heat-retaining mechanisms	i. increased metabolic rate (thyroid hormones, sympathetic nervous system)
B. Heat-dissipating mechanisms	ii. vasodilation of blood vessels of the skin (decreased sympathetic tone)
	iii. increased activity of sympathetic cholinergic fibers to sweat glands.
	iv. shivering
	v. vasoconstriction of blood vessels of the skin (increased sympathetic tone)

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#Question id: 1278

#Unit 4. Cell Communication and Cell Signaling

Vertebrate gap junctions are composed of:

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#Question id: 10569

#Unit 6. System Physiology – Plant

Plants that grow in saline environments, called

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#Question id: 1065

#Unit 4. Cell Communication and Cell Signaling

Resistance of some animals to certain viral diseases is based on

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#Question id: 4378

#Unit 3. Fundamental Processes

This serves as the promoter for 70% of eukaryotic genes and typically serves as a control region for genes that are transcribed at relatively low rates.