Question

Which of these is an example of secondary growth? a. Growth of flower buds b. Growth of leaves c. Growth of new roots d. Increased thickness of stem

Answer 1

Answer:

d. Increased thickness of stem

Secondary growth is characterized by an increase in thickness or girth of the plant. It is caused by cell division in the lateral meristem. Herbaceous plants mostly undergo primary growth, with little secondary growth or increase in thickness

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Answer 2

Increased thickness of stem is an example of secondary growth in Plants.

• The Growth in plants is of two types - Primary growth and secondary growth.
• The growth that occurs due to the differentiation of the cells of the apical meristem results in the vertical elongation of the plant.
• Examples of primary growth in plants are- Growth of flower buds, growth of leaves, and growth of new roots.
• Secondary growth refers to the horizontal or increase in girth of dicotyledons due to the differentiation of the secondary meristems namely Vascular cambium and cork cambium.
• Vascular cambium helps in the addition of the diameter of the plant by producing secondary xylem in the inward direction and secondary phloem outside the stem or root.
• The growth of secondary xylem and secondary phloem helps in the formation of wood that helps in building rigid trunks of trees
• Increased thickness of stem is an example of secondary growth in plants.

Hence, option (d). Is correct.

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