Which of the following vitamins inhibits the callus formation and improve shoot growth?

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#Question id: 18818

#Unit 13. Methods in Biology

This PCR variant uses degenerate primers to amplify unknown sequences of DNA, related to a known DNA sequence is

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#Question id: 9171

#Unit 9. Diversity of Life Forms

Suppose that the number of bird species is determined mainly by the number of vertical strata found in the environment. If so, in which of the following biomes would you find the greatest number of bird species?

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#Question id: 9211

#Unit 9. Diversity of Life Forms

Of the following ecosystem types, which have been impacted the most by humans?

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#Question id: 15776

#Unit 5. Developmental Biology

Which stem cells play critical roles in fueling organogenesis in the embryo and regeneration in adult tissues?

A. Adult stem cells.

B. Embryonic stem cells

C. True stem cells

D. Tissue specific stem cells

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#Question id: 33896

#Unit 2. Cellular Organization

In hydroxyapatite column chromatography used during DNA reassociation studies, what is the principle behind the differential binding of single- and double-stranded DNA?