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: 4741

#Unit 8. Inheritance Biology

The F2 progeny from a particular cross exhibit a modified dihybrid ratio of 9 : 7 (instead of 9 : 3 : 3 : 1). What phenotypic ratio would be expected from a testcross of the F1?

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#Question id: 11414

#Unit 10. Ecological Principles

Which of the following combination of species feature that affecting a species’ sensitivity to extinction?

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#Question id: 3887

#Unit 3. Fundamental Processes

Aptamers are

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#Question id: 10991

#Unit 7. System Physiology – Animal

When recording lead I on an EKG, the right arm is the negative electrode, and the positive electrode is the

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#Question id: 3625

#Unit 8. Inheritance Biology

If a heterozygous two recessive mutation at different site will give mutant phenotype when gene involved