The phase restricted to the tips of roots and shoots, where the cells constantly divided & increase, in number is:

Explanation

The phase restricted to the tips of roots and shoots, where the cells constantly divided & increase, in number is formative phase. The "formative phase" generally refers to a period or stage in a process where important formative or shaping activities occur. The term "formative" itself relates to the shaping or development of something. The exact meaning of "formative phase" can vary depending on the context in which it is used. It is often used in education, psychology, and various other fields.