In this post, I am sharing the Class 12 Biology Chapter 19 Notes PDF for the students of Intermediate Part 2. This chapter’s name is Growth and Development. Students can download the Class 12 Biology Chapter 19 Notes PDF on their laptops or mobile. These Biology Notes are for all the boards working under the Punjab Board like Gujranwala Board, Lahore Board, Faisalabad Board, Multan Board, Rawalpindi Board, Sargodha Board, DG Kahn Board, and Sahiwal Board. Here are the complete FSC 2nd Year Biology Notes PDF chapters.
FSC Part 2 Biology Chapter 19 Notes – Growth and Development
GROWTH:
Defination: Growth is permanent and irreversibole increase in size that occurs as an organism matures.
DEVELOPMENT
Defination: Series of stages by which a zygote becomes an organisms or by which an organism changes dureing its life span include puberty & opening for example. It is programmed series of stages, which form a complex organism from a zygote.
GROWTH AND DEVELOPMENT IN PLANTS
Open Growth:
A plant has a growth pattern called open growth, because throughout life, the plant adds new organs, such as branches, leaves and roots, enlarging from the tips of roots and shoots.
Growing Points:
These are the regions where growth takes place in plants. In lower plants, the entire plant body is capable of growing, but in higher plants is limited to certain regions know as growing points.
Meristems:
These are young tissue or groups of cells tht retain the potential to divide. These growing points or meristaems are located in the stemm and roodt and they are of following types.
Apical Meristems
For the height growth of plant. The apical meristems are found at the tips of roots and shoot and are primarily concerned with the elongation of plant body. These are perpetual (continuous) growth zones found at the apices (tips) of root and stem. They are responsible for increase in the number of cells at the tips of roots and stem, so the yplay important role in primary growth.
How to Download 2nd year Biology Chapter 19 Notes
These 2nd Year Biology Notes you can read online or download them. By clicking the above read button now you can download 12th Class Biology Chapter 19 Notes very easily on your mobile phone and laptop. Please don’t forget to subscribe to our YouTube channel ilmihub.
Relevant Notes
- 12th Class Biology Chapter 18 Notes
- 12th Class Biology Chapter 18 Short Questions Notes
- 12th Class Biology Chapter 19 MCQs Notes
