Multiple choice

The elongation of the stem is brought by

  1. Collenchyma

  2. Parenchyma

  3. Sclerenchyma

  4. Sclereids

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A Correct answer
Explanation

The cells are elongated and are circular, oval or polygonal in cross-section. Cell wall is unevenly thickened with cellulose at the corners against the intercellular spaces. Nucleus is present ,and hence the tissue is living. Vacuoles are small. Intercellular spaces are generally absent. If they contain chlorophyll, they are known as chlorenchyma. It provides mechanical support to the stem. Being extensible, these cells readily adapt themselves, to the rapid elongation of the stem.

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