Which of the following causes excessively high levels of toxic chemicals in fish-eating birds? 

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#Question id: 12105

#Unit 10. Ecological Principles

A species of fish is found to require a certain water temperature, a particular oxygen content of the water, a particular depth, a rocky substrate on the bottom, and a variety of nutrients in the form of microscopic plants and animals to thrive. These requirements describe its 

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#Question id: 20027

#Unit 13. Methods in Biology

The technique which are based on the precipitation reaction in the fluids and in the gels are,

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#Question id: 20411

#Unit 3. Fundamental Processes

In intron mutations are expected to be selectively neutral except

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#Question id: 5228

#Unit 11. Evolution and Behavior

Multigene families are

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#Question id: 23463

#General Aptitude

Statement— Should Indian scientists working abroad be called back to India?

Arguments—

I) Yes. They must serve the motherland first and forget about discoveries, honours, facilities and all.

II) No. We have enough talent; let them stay where they want.