Read the following statements and choose the following option: 1. Growth is measured only by cell number 2. Growth is reversible 3. Increase in protoplasm is difficult to measure directly 4. Growth in plants is open

Step-by-step solution

Increase in protoplasm is difficult to measure directly, one generally measures some quantity which is more or less proportional to it. Growth is measured by a variety of parameters some of which are: increase in fresh weight, dry weight, length, area, volume and cell number.