Shortly after the discovery of kinetin, it was observed that the differentiation of cultured callus tissue derived from tobacco pith segments into either roots or shoots depends on the ratio of auxin to cytokinin in the culture medium. Whereas

a) high auxin:cytokinin ratios stimulated the formation of roots

b) high auxin:cytokinin ratios stimulated the formation of shoots

c) low auxin:cytokinin ratios led to the formation of shoots

d) low auxin:cytokinin ratios stimulated the formation of roots

which of the following combination is correct about the ratio of auxin to cytokinin

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#Question id: 9573

#Unit 10. Ecological Principles

The energy of incident solar radiation reaching the surface of the earth declines toward the poles from its maximum in equatorial regions. One cause of this phenomenon is greater absorption of solar energy by the earth's atmosphere at high latitudes. Why is this?

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#Question id: 23258

#Unit 13. Methods in Biology

If the probes are hybridized at the ends of the chromosome then they are called as

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#Question id: 9187

#Unit 9. Diversity of Life Forms

Which of the following are defenses that some plants use against herbivory?

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#Question id: 21004

#Unit 12. Applied Biology

What is phytoremediation ?

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#Question id: 18369

#Unit 12. Applied Biology

The chemical and breakdown products of herbicide DDT cause eggshell thinning and population declines in multiple North American and European bird of prey. They are remediated by