The minimum number of colours required to paint all the sides of a cube so that no two adjacent faces may have the same colour, is

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#Question id: 11425

#10. Ecological Principles

Walter's climate diagrams allow us to identify any months that have a water deficit. These are months in which:

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#Question id: 23249

#13. Methods in Biology

Which enzyme converts the PPi to ATP in Pyrosequencing?

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#Question id: 943

#1. Molecules and their Interaction Relevant to Biology

An amino acid formed by transamination of a citric acid cycle intermediate is ________.

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#Question id: 9235

#9. Diversity of Life Forms

Agricultural lands frequently require nutrient augmentation because ________.

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#Question id: 16119

#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?