Evergreen Forests Characteristics and Distribution
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Questions and Answers

What is the minimum rainfall required for the formation of evergreen forests?

  • 250 cm
  • 200 cm (correct)
  • 100 cm
  • 150 cm
  • Which of the following states is NOT typically associated with evergreen forests in India?

  • Kerala
  • Rajasthan (correct)
  • Maharashtra
  • Tamil Nadu
  • What is the typical climate found in regions with evergreen forests?

  • Tropical (correct)
  • Polar
  • Desert
  • Temperate
  • What percentage of the surface area is covered by evergreen forests?

    <p>70%</p> Signup and view all the answers

    Which of the following is a characteristic of evergreen forests?

    <p>Dense population</p> Signup and view all the answers

    What is the primary function of the apical meristem in plant growth?

    <p>To produce new tissues and increase plant length</p> Signup and view all the answers

    Which type of growth is characterized by an increase in plant thickness?

    <p>Secondary growth</p> Signup and view all the answers

    What is the main role of auxins in plant development?

    <p>To promote root growth and apical dominance</p> Signup and view all the answers

    Which of the following factors does NOT directly affect plant growth and development?

    <p>Gravity</p> Signup and view all the answers

    What is the primary function of cytokinins in plant development?

    <p>To promote cell division and leaf senescence</p> Signup and view all the answers

    During which stage of plant development does the seedling establish its root and shoot systems?

    <p>Seedling establishment</p> Signup and view all the answers

    Which type of plant growth is characteristic of dicots?

    <p>Growth from the sides of the stem</p> Signup and view all the answers

    What is the role of ethylene in plant development?

    <p>To promote fruit ripening and senescence</p> Signup and view all the answers

    Which of the following hormones promotes cell elongation and stem growth?

    <p>Gibberellins</p> Signup and view all the answers

    What is the final stage of plant development characterized by?

    <p>Leaf senescence and aging</p> Signup and view all the answers

    Study Notes

    Characteristics of Evergreen Forests

    • Evergreen forests are found in regions with rainfall above 200 cm and temperature between 15-30°C.
    • They are densely populated and have a multilayered structure.
    • These forests are home to a vast variety of animals and plants.

    Distribution of Evergreen Forests in India

    • Evergreen forests are commonly found in regions with high rainfall, particularly in Western Ghats and Eastern India.
    • They are typically found in the states of Tamil Nadu, Kerala, Karnataka, Maharashtra, Assam, Arunachal Pradesh, Nagaland, Tripura, Meghalaya, and West Bengal.
    • They are also found in the Andaman and Nicobar Islands.

    Features of Evergreen Forests

    • They cover around 70% of the surface area.
    • They are found in regions with a tropical climate.
    • They support a diverse range of flora and fauna.
    • They are found in areas with high rainfall and moderate temperature.

    Characteristics of Evergreen Forests

    • Found in regions with rainfall above 200 cm and temperature between 15-30°C.
    • Densely populated with a multilayered structure.
    • Home to a vast variety of animals and plants.

    Distribution of Evergreen Forests in India

    • Found in regions with high rainfall, particularly in Western Ghats and Eastern India.
    • Commonly found in the states of Tamil Nadu, Kerala, Karnataka, Maharashtra, Assam, Arunachal Pradesh, Nagaland, Tripura, Meghalaya, and West Bengal.
    • Also found in the Andaman and Nicobar Islands.

    Features of Evergreen Forests

    • Cover around 70% of the surface area.
    • Found in regions with a tropical climate.
    • Support a diverse range of flora and fauna.
    • Found in areas with high rainfall and moderate temperature.

    Plant Growth and Development

    Growth Patterns

    • Monocots grow from the tip of the stem, producing new tissues from the apical meristem.
    • Dicots grow from the sides of the stem, producing new tissues from the cambium layer.

    Types of Growth

    • Primary growth occurs through cell division and expansion in the apical meristem, leading to an increase in length.
    • Secondary growth occurs through cell division and expansion in the cambium layer, leading to an increase in thickness.

    Factors Affecting Growth

    • Light affects photosynthesis, growth, and development, with different wavelengths promoting varying responses.
    • Temperature influences metabolic rate, growth, and development, with optimal temperatures varying by plant species.
    • Water availability affects turgor pressure, growth, and development, with plants responding to drought and flooding.
    • Nutrient availability affects growth and development, with essential micronutrients and macronutrients required for plant function.
    • Hormones, including auxins, gibberellins, cytokinins, and ethylene, regulate growth and development.

    Plant Developmental Stages

    • Seed germination involves the radicle and cotyledon emerging from the seed coat, followed by root and shoot growth.
    • Seedling establishment involves the development of root and shoot systems, with the seedling becoming self-sufficient.
    • Vegetative growth is characterized by leaf development and expansion, with plants producing new leaves and stems.
    • Reproductive growth is characterized by flower and fruit development, with plants allocating resources to reproduction.
    • Senescence is the final stage, marked by aging, decline, and eventual death.

    Hormonal Regulation

    • Auxins promote cell elongation, root growth, and apical dominance, regulating cell growth and differentiation.
    • Gibberellins promote cell elongation, seed germination, and stem growth, influencing plant height and seedling establishment.
    • Cytokinins promote cell division, root growth, and leaf senescence, regulating root-shoot balance and leaf longevity.
    • Ethylene promotes fruit ripening, senescence, and abscission, regulating fruit maturation and leaf drop.

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    Description

    Learn about the characteristics of evergreen forests, including their climatic conditions, structure, and biodiversity, as well as their distribution in India, particularly in Western Ghats and Eastern India.

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