Which one of these processes describes bottleneck effect?

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#Question id: 4589

#11. Evolution and Behavior

Darwin used the phrase "descent with modification" to explain ________.

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#Question id: 16118

#7. System Physiology – Animal

Following statements are regarding to the heat production by the activation of sympathetic nervous system.

A. Activation is stimulation of β receptors in brown fat, which increases metabolic rate and heat production.

B. Activation is stimulation of α2 receptors in brown fat, which increases metabolic rate and heat production.

C. Stimulation of α1 receptors in vascular smooth muscle of skin blood vessels, producing vasoconstriction. Vasoconstriction reduces blood flow to the surface of the skin.

D. Stimulation of α1 receptors in vascular smooth muscle of skin blood vessels, producing vasodilation. Vasodilation reduces blood flow to the surface of the skin.

Which of the following combination is correct?

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#Question id: 21183

#13. Methods in Biology

This PCR have mixtures of similar oligonucleotides that are used in a PCR to amplify unknown sequences of DNA, related to a known DNA sequence is

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#Question id: 23469

#Aptitude

Statement— Should articles of only deserving authors be allowed to be published?

Arguments—

I) Yes. It will save a lot of paper which is in short supply.

II) No. It is not possible to draw a line between the deserving and the undeserving.

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#Question id: 24040

#Aptitude

Which one of the following Telephonic Conferencing with a radio link is very popular throughout the world?