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Index: Plant Growth & Development | Biology Class 11 - NEET PDF Download

(a) General Content

(b) Growth

(c) Differentiation, Dedifferentiation & Redifferentiation

(d) Plant Growth regulators, Photoperiodism & Vernalisation

(e) Previous Year Questions

(f) Summary and Mind Map

(g) NCERT Textbook and Solutions

(h) Tests of the Chapter: Respiration in Plants

The document Index: Plant Growth & Development | Biology Class 11 - NEET is a part of the NEET Course Biology Class 11.
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FAQs on Index: Plant Growth & Development - Biology Class 11 - NEET

1. What are the factors that influence plant growth and development?
Ans. Plant growth and development are influenced by various factors, including environmental conditions (such as light, temperature, and humidity), availability of nutrients in the soil, genetic characteristics of the plant species, and interactions with other organisms like pests and diseases. These factors can either promote or inhibit the growth and development of plants.
2. How does light affect plant growth and development?
Ans. Light plays a crucial role in plant growth and development. It is essential for photosynthesis, the process through which plants convert sunlight into energy. Different wavelengths of light have varying effects on plant growth, with blue and red light being particularly important for photosynthesis. Light also affects plant morphology, such as stem elongation and leaf expansion, by influencing hormone synthesis and signaling pathways.
3. What is the role of hormones in plant growth and development?
Ans. Hormones are chemical substances produced by plants that regulate various aspects of their growth and development. They control processes such as seed germination, stem elongation, leaf growth, flowering, and fruit ripening. Different hormones, including auxins, cytokinins, gibberellins, abscisic acid, and ethylene, have specific roles in plant growth and development. They interact with each other and respond to environmental cues to regulate plant responses.
4. How do plants acquire nutrients from the soil?
Ans. Plants acquire nutrients from the soil through their root systems. The roots have specialized structures called root hairs, which increase the surface area for nutrient absorption. Plants take up essential nutrients, such as nitrogen, phosphorus, and potassium, in the form of ions dissolved in water. These nutrients are transported through the plant's vascular system to different parts, where they are used for various metabolic processes and growth.
5. What are the stages of plant development?
Ans. Plant development can be divided into several stages, including seed germination, vegetative growth, flowering, fruiting, and senescence. Seed germination is the process by which a seed begins to grow into a new plant. Vegetative growth involves the production of leaves, stems, and roots. Flowering is the stage when plants produce flowers, followed by the formation of fruits. Senescence refers to the aging and eventual death of plant tissues. Each stage is regulated by specific genetic and environmental factors.
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