Hyperpigmentation is a sign of: 

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#Question id: 37893

#Plant Biotechnology

Tracheary element differentiation is considered an irreversible process. What is the primary cytological reason for this? 

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#Question id: 37894

#Plant Biotechnology

Match the term with the correct definition regarding cell regeneration pathways:

List I (Process)	List II (Description)
A. Organogenesis	1. Direct formation of embryos from somatic cells
B. Somatic Embryogenesis	2. Dedifferentiation → callus → redifferentiation → organs
C. Proliferative Cycle	3. Daughter cells are copies of mother, differentiate without division
D. Quantal Cycle	4. Daughter cells differ from mother, less likely to differentiate

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#Question id: 37895

#Plant Biotechnology

Which of the following is identified as the "principal limiting factor" for vascular differentiation in tissue culture? 

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#Question id: 37896

#Plant Biotechnology

Root culture research was first initiated in 1922 by:

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#Question id: 37897

#Plant Biotechnology

Increased interest in root cultures during the 1980s was mainly due to:

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#Question id: 37898

#Plant Biotechnology

Who was the first to induce nucellar embryony in Citrus microcarpa using a modified White’s medium?