Question:

Primary growth of the plants contributes to the elongation of the plants along their axis. Root apical meristem and shoot apical meristem are responsible for primary growth of the plants.

Updated On: Jul 6, 2022
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The Correct Option is A

Solution and Explanation

Plant growth is unique because plants retain the capacity for unlimited growth throughout their life. This ability of the plants is due to the presence of meristems at certain locations in their body. The cells of such meristems have the capacity to divide and self-perpetuate.The root apical meristem and shoot apical meristem are indeterminate meristems, because these meristems continue their activity throughout life of the plant. Root apical meristem and shoot apical meristem cause primary growth of plants. It also causes the elongation of the plants along their axis.
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Concepts Used:

Plant Growth and Development

Growth in Plants:

Plants have the distinctive ability to grow throughout their life. The meristem cells present there in the roots and shoot apical lead to the primary growth of the plant. The primary growth which happens or takes place at the tips of the stem and roots of the plant contributes to the elongation of the plant along its axis.

In the later stages of growth in plants, the growth in dicotyledonous, vascular cambium, gymnosperms, and cork-cambium are also caused by the existence of meristems in them. These intercalary meristems are put up to increase the girth of the organs of the plant in which they are active. Such type of growth is commonly known as secondary growth.

Many parameters such as area, volume, fresh weight, cell number, dry weight, length, etc are utilized to measure the growth in plants as increase in the amount of protoplasm is responsible for the growth in plants.

Read More: Plant Growth and Development