Plant Growth and Development MCQ practice test for NEET Biology, based on NEET syllabus Unit 4 (Plant Physiology) and NCERT Class XI. Each set has 15 NEET-pattern MCQs in 15 minutes. Questions cover the features of plant growth, phases of growth, arithmetic and geometric growth and the sigmoid growth curve, absolute and relative growth rates, conditions for growth, differentiation, dedifferentiation and redifferentiation, development and plasticity, and the plant growth regulators auxin, gibberellin, cytokinin, ethylene and abscisic acid, with their discovery and uses. Previous-year NEET questions are mixed with new questions.