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Multiple Choice Questions (MCQs) About the Significance of Secondary Growth in Plants

 

Multiple Choice Questions (MCQs) About the Significance of Secondary Growth in Plants

Explore the significance of secondary growth in plants! 🌱 Uncover the secrets behind increased girth, enhanced support, and economic impact. #Botany


  1. What is secondary growth in plants?

    • A. Increase in height
    • B. Increase in girth and thickness
    • C. Photosynthesis
    • D. Root development

    Answer: B

    Explanation: Secondary growth refers to the increase in girth and thickness of a plant, differentiating it from primary growth, which focuses on height.

  2. Which tissues play a central role in secondary growth?

    • A. Xylem and Phloem
    • B. Epidermis
    • C. Meristem
    • D. Cortex

    Answer: C

    Explanation: Cambium tissues are crucial in secondary growth, dividing and differentiating to form new layers of vascular tissues.

  3. What is the primary purpose of secondary growth in plants?

    • A. Enhanced structural support
    • B. Faster photosynthesis
    • C. Root elongation
    • D. Leaf development

    Answer: A

    Explanation: Secondary growth provides enhanced structural support, especially for long-lived and tall plant species.

  4. Which growth phase is responsible for the elongation of roots and stems?

    • A. Secondary growth
    • B. Tertiary growth
    • C. Primary growth
    • D. Extra growth

    Answer: C

    Explanation: Primary growth is responsible for the elongation of roots and stems, focusing on increasing height.

  5. What environmental stimuli can plants with secondary growth better respond to?

    • A. Temperature changes
    • B. Light intensity
    • C. Both A and B
    • D. Rainfall

    Answer: C

    Explanation: Plants with secondary growth often exhibit heightened adaptability to temperature changes and variations in light intensity.

  6. Which economic sector benefits from secondary growth in plants?

    • A. Information technology
    • B. Agriculture and horticulture
    • C. Fashion industry
    • D. Pharmaceutical industry

    Answer: B

    Explanation: Agriculture and horticulture benefit from knowledge about secondary growth for optimizing crop yields and landscaping.

  7. What does the cambium tissue do during secondary growth?

    • A. produces energy
    • B. divides and differentiates
    • supports the plant structure
    • D. aids in photosynthesis

    Answer: B

    Explanation: Cambium tissues divide and differentiate, forming new layers of vascular tissues during secondary growth.

  8. How does secondary growth contribute to woody plant formation?

    • A. Enhances root development
    • B. forms new leaves
    • C. Creates durable wood
    • D. increases flower production

    Answer: C

    Explanation: Secondary growth is responsible for the formation of durable wood in woody plants.

  9. What environmental factors can challenge secondary growth?

    • A. Increased carbon dioxide levels
    • B. Pollution
    • C. Both A and B
    • D. Ozone layer depletion

    Answer: C

    Explanation: Environmental factors like increased carbon dioxide levels and pollution can pose challenges to secondary growth.

  10. Why is understanding the differences between primary and secondary growth important?

    • A. To confuse botanists
    • B. for comprehensive plant biology understanding
    • C. Just for academic interest
    • D. It has no significance.

    Answer: B

    Explanation: Understanding the differences between primary and secondary growth is crucial for a comprehensive understanding of plant biology.

  11. Which human activity negatively impacts secondary growth in plants?

    • A. Afforestation
    • B. Sustainable forestry practices
    • C. Deforestation
    • D. Conservation efforts

    Answer: C

    Explanation: Deforestation, the removal of large forested areas, negatively impacts secondary growth in plants.

  12. What role does secondary growth play in the economic sector?

    • A. supports the technology industry
    • B. Enhances fashion trends
    • C. Contributes to wood-based industries
    • D. Aids in pharmaceutical research

    Answer: C

    Explanation: Secondary growth contributes to wood-based industries, providing resources for various economic sectors.

  13. Which tissues are developed through secondary growth to enhance water conduction?

    • A. Epidermis
    • B. Xylem and Phloem
    • C. Meristem
    • D. Cortex

    Answer: B

    Explanation: Secondary growth leads to the development of xylem and phloem tissues, enhancing water conduction.

  14. What is the primary function of primary growth in plants?

    • A. Increase in girth and thickness
    • B. Enhanced structural support
    • C. Elongation of roots and stems
    • D. Formation of durable wood

    Answer: C

    Explanation: Primary growth focuses on the elongation of roots and stems, contributing to increased height.

  15. How do shrubs and vines differ in experiencing secondary growth compared to trees?

    • A. They don't undergo secondary growth.
    • B. They exhibit similar patterns.
    • C. It happens at a different scale.
    • D. Shrubs and vines undergo tertiary growth.

    Answer: C

    Explanation: Shrubs and vines undergo secondary growth, but on a different scale compared to towering trees.

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