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FAQs on Mind Map: Plant Growth & Development - Biology Class 11 - NEET

1. What are the main factors affecting plant growth and development?
Ans. The main factors affecting plant growth and development include light, water, temperature, soil nutrients, and genetics. Light is essential for photosynthesis, while water is crucial for nutrient transport and metabolic processes. Temperature influences enzyme activities and overall metabolic rates. Soil nutrients provide essential elements for growth, and genetics determine the plant's inherent growth potential.
2. How do hormones regulate plant growth?
Ans. Plant hormones, or phytohormones, play a vital role in regulating growth and development. Key hormones include auxins, gibberellins, cytokinins, ethylene, and abscisic acid. Auxins promote cell elongation, gibberellins stimulate stem growth and seed germination, cytokinins encourage cell division, ethylene regulates fruit ripening, and abscisic acid helps plants respond to stress conditions.
3. What is the role of photosynthesis in plant growth?
Ans. Photosynthesis is the process by which plants convert light energy into chemical energy, producing glucose and oxygen from carbon dioxide and water. This glucose serves as a fundamental energy source for growth, development, and metabolism. Adequate photosynthesis is crucial for healthy plant growth as it directly affects biomass accumulation and overall productivity.
4. How does soil quality impact plant development?
Ans. Soil quality significantly impacts plant development through its physical, chemical, and biological properties. Good quality soil provides essential nutrients, adequate drainage, and a suitable pH level. Poor soil quality can lead to nutrient deficiencies, waterlogging, or poor aeration, which can hinder root growth, reduce plant health, and limit overall development.
5. What are the stages of plant growth?
Ans. The stages of plant growth typically include germination, seedling, vegetative, flowering, and fruiting stages. Germination involves the sprouting of seeds, followed by the seedling stage where young plants develop leaves and roots. The vegetative stage is characterized by rapid growth and leaf development, while the flowering stage involves the formation of flowers for reproduction. Finally, the fruiting stage sees the development of fruits containing seeds.
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