What is development ?

Development is the sequence of events which occurs in life cycle of a cell, organ or organism that includes growth, differentiation, maturation and senescence.
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Give examples of antagonist with respect to plant hormones

Abscisic acid acts as a antagonist to Gibberellic acids. 
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 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.

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Name various naturally occuring phytohormones.

The naturally occurring phytohormones are :
auxin, gibberellins, cytokinins, ethylene and abscisic acid.
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What is florigen ?

 Florigen is a hypothetical hormone which causes flowering. The hormone is capable of passing from one plant to another via grafting.
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