What is Plant Growth? II Primary and Secondary Growth II Difference between Primary and Secondary Growth II Easy and Simple Notes II Lets Bloom study Material II Free study material II NVS PGT Biology/Dsssb/KVS Previous year questions.

 What is Growth?

Growth is the increase in size of Plant.

Plant grows above and below ground

What is Primary Growth?

Primary growth is characterized by the lengthening of roots and shoots and by the proliferation of new roots and shoots through branching. This means Primary growth means the plant grows taller and its roots grow deeper. It also means the plant forms new branches and new roots.

Apical meristem and Intercalary is meristem responsible for Primary growth

What is Secondary Growth?

Secondary growth is characterized by increase in Girth (Diameter) of plant. Woody plants like trees and shrubs have an extra part called the secondary plant body develops due to secondary growth.

Secondary plant body includes wood and bark. As this part grows, the stems and roots become thicker. This thickening continues as the plant grows older.

Lateral meristem is responsible for secondary growth

Secondary growth also replaces Epidermis with Periderm as stem of plant mature.

Primary growth develops what is called the primary plant body, while secondary growth develops the secondary plant body. 

Difference between Primary and Secondary Growth/ Comparison of Primary Growth and Secondary Growth in Plants

QUESTION PRACTICE

(I)Secondary Growth is absent in (NVS 2022)

1. Dicot Root and Dicot Stem
2. Dicot Root and Monocot Stem
3. Monocot Root and Monocot Stem
4. Dicot stem and Monocot Root

(II)Palm tree increase in diameter of trunk by means of (NVS PGT Biology)

1. Production of Secondary Xylem and Secondary Meristem
2. By Lateral meristem
3. Formation of Autumn and Spring Wood
4. Division and Enlargement of Parenchymatous tissue

(III)Which meristem occurs in the mature regions of roots and shoots and responsible for secondary growth? Dsssb Pgt Biology

1.  Intercalary meristem 
2. Lateral meristem 
3. Simple tissue 
4. Apical Meristem