What is the reason behind that the PAS-related domain (PRD) is only present in the Plant phytochrome, but absent in cyanobacterial Cph1 and Bacterial BphP?

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#Question id: 16119

#Unit 7. System Physiology – Animal

Following statements are regarding to Shivering, which is the most potent mechanism for increasing heat production in the body. 

A. Cold environmental temperatures activate centers in the posterior hypothalamus during shivering, which then activate the α and γ motoneurons innervating skeletal muscle. 

B. Shivering involves skeletal muscle contracts rhythmically, generating heat and raising body temperature.

C. Shivering involves stimulation of Na+-K+ ATPase and raising body temperature.

D. Shivering involves stimulation of β receptors in brown fat, which increases metabolic rate and heat production.

Which of the following combination is correct?

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#Question id: 11634

#Unit 8. Inheritance Biology

Given below, is the result of a complementation test for six independent mutants (A to H) '+' represents complementation; '-' represents noncomplementation Based on the above, which one of the following conclusions is correct?

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#Question id: 11461

#Unit 7. System Physiology – Animal

Elephants hear sounds that are too low for humans to hear. This sensitivity is primarily due to the differences in the ________.

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#Question id: 12246

#Unit 10. Ecological Principles

The graphs below show that the relationship between atmospheric CO2 and mean global temperature is

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#Question id: 523

#Unit 1. Molecules and their Interaction Relevant to Biology

Compared to pyruvate, the carbon atoms in lactate ________.