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Plant Growth and Development

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

How can we quantitatively compare the growth of living system?

Quantitative comparisons between the growth of living system can be done in two ways :

(i) By measuring and comparing the total
growth per unit time that is the absolute growth rate.
(ii) By comparing the  growth of the given system per unit time expressed on a common basis that is the the relative growth rate.

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 ?

Yabuta.

Term kinetinwas coined by whom ?

Skoog and Miller.

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.

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