Zigya Logo

Chapter Chosen

Plant Growth and Development

Book Chosen


Subject Chosen


Book Store

Download books and chapters from book store.
Currently only available for.
CBSE Gujarat Board Haryana Board

Previous Year Papers

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for.
Class 10 Class 12

Writes notes on following :

(a) Senescence (b) Abscission

(c) Quiescence (d) Vivipary.

(a) Senescence : Senescence is the process of  ageing in plants. It is the period between maturity and death.

(b) Abscission: It is the natural falling of leaves, foliage branches, fruits, floral parts etc.  


(c) Quiescence : It is the suspension of growth due to external factors. It is a period during which development is suspended. 

(d) Vivipary : It is the process when seeds germinate inside fruits which are still attached to the mother plant. 

 Term kinetinwas coined by whom ?

Skoog and Miller.

What is C/N ratio ?

C/N ratio is the ratio of carbohydrates and nitrogenous compounds which regulate the growth in plants. 

Who coined the term gibberellin ?


 Give the types of auxins.

Auxins are of two types :

(1) Natural auxins : These are naturally occuring auxins, isolated from plants and are regarded as phytohormones e.g. IAA. NAA etc.

(2) Synthetic auxins : These are synthesized by artificially e.g. IBA 2,4-D etc.

Who isolated auxin and from where ?

Auxin was isolated by F.W. Went from tips of coleoptiles of oat seedling.