Recent questions tagged plant-growth-and-development

Which is false about auxin.It

asked Apr 9, 2014 by sreemathi.v

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The hormone capable of replacing the requirement of long photoperiods for flowering is

asked Apr 9, 2014 by sreemathi.v

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Bioassay of IAA is

asked Apr 9, 2014 by sreemathi.v

2 answers

Which one increases in the absence of light

asked Apr 9, 2014 by sreemathi.v

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Auxin suppresses growth of

asked Apr 9, 2014 by sreemathi.v

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Internodal elongation is stimulated by

asked Apr 9, 2014 by sreemathi.v

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IAA was first isolated from

asked Apr 9, 2014 by sreemathi.v

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Natural plant hormones were isolated for the first time form

asked Apr 9, 2014 by sreemathi.v

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Plant material used in tissue culture is

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Phytochrome is

asked Apr 9, 2014 by sreemathi.v

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Which one shows red $\leftrightharpoons$ far-red interconversions

asked Apr 9, 2014 by sreemathi.v

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Which one produces more ethylene

asked Apr 9, 2014 by sreemathi.v

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A chemical believed to be involved in flowering is

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Ethylene is

asked Apr 9, 2014 by sreemathi.v

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Artificial ripening of fruits is accomplished by treatment with

asked Apr 9, 2014 by sreemathi.v

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Photomorphogenetic pigment in plants is

asked Apr 9, 2014 by sreemathi.v

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Which of the following physiological effect is caused in plants by gibberellic acid

asked Apr 9, 2014 by sreemathi.v

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The substance which accelerates the growth in stem is

asked Apr 9, 2014 by sreemathi.v

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A response to length of day in plants is called

asked Apr 9, 2014 by sreemathi.v

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The classical experiments in growth were performed by

asked Apr 9, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Cytokinins help in retention of chlorophyll and delayed senescence in leaves.}\\\text{Reason:The hormone cytokinin stimulates root initiation.}\end{array}$

asked Apr 9, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Some of the plants flower only in summer whereas some flower in winters.}\\\text{Reason:These flowers require specific photoperiods for flowering.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses :

asked Apr 8, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:If the long dark period is interrupted by flash of light in xanthium it will not flower.}\\\text{Reason:Xanthium is a long day plant in which case a continuous long light period is essential for flowering.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses

asked Apr 8, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:The isolated aleurone layer induces amylase activity when Gibberellic acid is added.}\\\text{Reason:Enzyme amylase converts insoluble starch to soluble sugars.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:In germinating seeds fats are stored as reserve food material and are rich in glyoxysomes.}\\\text{Reason:Germinating seeds are responsible for the conversion of fats into sugar to provide energy to germinating seeds.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:In the actively growing herbaceous plants the axillary buds are generally dormant.}\\\text{Reason:It is because of apical dominane due to the presence of auxins.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses :

asked Apr 8, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:In plants during water stress and drought conditions ABA plays an important role.}\\\text{Reason:When the ABA is applied exogeneously it promotes stomatal opening.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses :

asked Apr 8, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:When the cytokinin is applied to the plants it induces senescence.}\\\text{Reason:Cytokinins promote the breakdown of roteins,chlorophyll and nucleic acids.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Ethylene is a gaseous phytohormone.}\\\text{Reason:It is responsible for the ripening of many fruits}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Dry seeds do not germinate.}\\\text{Reason:The most important external factor for seed germination is water.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:The pigment cytochrome controls photomorphogenetic responses.}\\\text{Reason:Cytochrome pigment occurs in two photoreversible forms.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

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Match the words for column I with Column II:In column I are given phytohormones and in column II their functions.

asked Apr 8, 2014 by sreemathi.v

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Match the words of the two columns :

asked Apr 8, 2014 by sreemathi.v

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