Chapter Chosen

Plant Growth and Development

Book Chosen

Biology

Subject Chosen

Biology

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
Define growth, differentiation, development, dedifferentiation, redifferentiation, determinate growth, meristem and growth rate.

Growth : Growth may be defined as permanent or irreversible change in the size of a cell, organ or whole organism usually accompanied by an increase in dry weight.

Differentiation : Differentiation is the process whereby cells undergo few to major structural changes that lead to the maturation. The cells mature to perform specialized functions. 

Development: Development includes all the series of changes which an organism goes through during its life cycle.

Dedifferentiation : It is the process by which the living differentiated cells which had lost the capacity to divide regain  the capacity to divide under certain conditions.

Redifferentiation : Redifferentiation is defined as maturation or differentiation of dedifferentiated tissues.

Determination growth . The ability of a cell, tissue or the organism to grow for a limited period is called determinate growth.

Meristem : Meristem is a group of cells which have power of division and add new cells to the body.

Growth rate : It is the increased growth per unit time.

270 Views

 Term kinetinwas coined by whom ?

Skoog and Miller.
1034 Views

Who isolated auxin and from where ?

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

1309 Views

Who coined the term gibberellin ?

Yabuta.
832 Views

What is C/N ratio ?

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

 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.

685 Views