Question:

Identify the correct and incorrect statements from the following. (I) 17500 new cells are produced per hour by a single maize root apical meristem. (II) With the help of length, growth of pollen tube is measured. (III) The growth of the leaf is measured in term of volume. (IV) Cells in a watermelon may increase in size by upto 350000 times.

Updated On: Jul 6, 2022
  • I, II, III are correct and IV is incorrect.
  • I, II, IV are correct and III is incorrect
  • II, III are correct and I, IV are incorrect.
  • I, IV are correct and II, III are incorrect
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The Correct Option is B

Solution and Explanation

Answer (b) I, II, IV are correct and III is incorrect
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Notes on plant growth and development

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