Plant Growth and Development

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Plant Growth and Development explains how plants grow, differentiate, and respond to internal and external factors throughout their life cycle. This category focuses on the processes controlling growth, differentiation, and development, making it suitable for Class 11–12 students, NEET aspirants, and undergraduate learners.

In this section, you will study:

  • Growth, development, and differentiation in plants

  • Meristematic activity and patterns of plant growth

  • Phases of plant growth and growth kinetics

  • Plant growth regulators and their physiological roles

  • Photoperiodism, vernalization, and plant movements

  • Environmental factors affecting plant growth and development

  • NCERT-based explanations, diagrams, MCQs, and exam-oriented questions

The content is structured to build clear conceptual understanding, improve process-based reasoning, and help students perform confidently in school examinations, NEET, and undergraduate assessments.

Develop a strong understanding of how plants grow and develop by linking physiological processes with environmental and hormonal regulation.

Q. What is phototropism?
  • A. Growth towards light
  • B. Growth away from light
  • C. Growth in response to gravity
  • D. Growth in response to water
Q. What is the main function of the cambium in plants?
  • A. Photosynthesis
  • B. Water transport
  • C. Growth in thickness
  • D. Nutrient storage
Q. What is the primary function of root hairs?
  • A. Photosynthesis
  • B. Water absorption
  • C. Nutrient storage
  • D. Support
Q. What is the primary function of stomata in plants?
  • A. Nutrient storage
  • B. Gas exchange
  • C. Water storage
  • D. Support
Q. What is the primary function of the cambium in plants?
  • A. Photosynthesis
  • B. Water transport
  • C. Growth in thickness
  • D. Nutrient storage
Q. What is the primary hormone responsible for promoting cell elongation in plants?
  • A. Gibberellins
  • B. Auxins
  • C. Cytokinins
  • D. Ethylene
Q. What is the role of cytokinins in plant growth?
  • A. Promote root growth
  • B. Stimulate cell division
  • C. Inhibit leaf senescence
  • D. All of the above
Q. What is the role of mycorrhizae in plant growth?
  • A. Water storage
  • B. Nutrient absorption
  • C. Photosynthesis
  • D. Gas exchange
Q. What is the role of mycorrhizal fungi in plant growth?
  • A. Photosynthesis
  • B. Nutrient absorption
  • C. Water storage
  • D. Pollination
Q. What is the role of the apical meristem in plants?
  • A. Photosynthesis
  • B. Cell division and growth
  • C. Water absorption
  • D. Nutrient storage
Q. What is the term for the growth response of a plant to light?
  • A. Thigmotropism
  • B. Phototropism
  • C. Hydrotropism
  • D. Gravitropism
Q. What is the term for the process by which plants lose water vapor through small openings in their leaves?
  • A. Transpiration
  • B. Respiration
  • C. Photosynthesis
  • D. Germination
Q. Which environmental factor is most critical for seed germination?
  • A. Light
  • B. Temperature
  • C. Soil type
  • D. Humidity
Q. Which of the following is NOT a macronutrient essential for plant growth?
  • A. Nitrogen
  • B. Phosphorus
  • C. Potassium
  • D. Iron
Q. Which of the following is NOT a phase of plant growth?
  • A. Maturation
  • B. Germination
  • C. Juvenile
  • D. Reproductive
Q. Which phase of the plant life cycle is characterized by the formation of gametes?
  • A. Sporophyte
  • B. Gametophyte
  • C. Seedling
  • D. Mature plant
Q. Which plant structure is primarily responsible for anchoring the plant and absorbing water and nutrients?
  • A. Stem
  • B. Leaf
  • C. Root
  • D. Flower
Q. Which plant structure is primarily responsible for nutrient storage?
  • A. Roots
  • B. Leaves
  • C. Stems
  • D. Flowers
Q. Which plant structure is primarily responsible for reproduction?
  • A. Roots
  • B. Leaves
  • C. Flowers
  • D. Stems
Q. Which process involves the conversion of light energy into chemical energy in plants?
  • A. Respiration
  • B. Photosynthesis
  • C. Transpiration
  • D. Fermentation
Q. Which stage of the plant life cycle is characterized by the formation of gametes?
  • A. Sporophyte
  • B. Gametophyte
  • C. Seedling
  • D. Mature plant
Q. Which structure is responsible for the production of pollen in flowering plants?
  • A. Stigma
  • B. Anther
  • C. Ovary
  • D. Style
Q. Which type of plant growth occurs at the tips of roots and shoots?
  • A. Lateral growth
  • B. Primary growth
  • C. Secondary growth
  • D. Apical growth
Q. Which type of plant growth occurs in response to environmental stimuli?
  • A. Primary growth
  • B. Secondary growth
  • C. Tropic growth
  • D. Lateral growth
Q. Which type of plant is characterized by having a vascular system?
  • A. Mosses
  • B. Ferns
  • C. Liverworts
  • D. Algae
Q. Which type of plant reproduction involves the use of spores?
  • A. Asexual reproduction
  • B. Sexual reproduction
  • C. Vegetative reproduction
  • D. Grafting
Q. Which type of plant tissue is responsible for the transport of water and minerals?
  • A. Phloem
  • B. Xylem
  • C. Cortex
  • D. Pith
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