Biology MCQs

Page No. 49

Type of sensations carried by nociceptors are_________________?


aTouch


bTemperature


cPressure


dPain


View Answer Pain

Which type of the receptors are present in the ear__________________?


aChemoreceptors


bMechanoreceptors


cPhotoreceptors


dThermoreceptors


View Answer Mechanoreceptors

Which of the following is used in brewing industry to promote malting_______________?


aGibberellins


bCytokinins


cAuxins


dAbscisic Acid


View Answer Gibberellins

The only promoter of leaf senescence in the following plant hormones is________________?


aGibberellins


bCytokinins


cAuxins


dAbscisic Acid


View Answer Abscisic Acid

Abscisic acid promotes flowering in short day plants and inhibits in long day plants, which of the following is antagonistic to abscisic acid in terms of flowering______________?


aGibberellins


bCytokinins


cAuxins


dEthene


View Answer Gibberellins

Which of the following is antagonist to Auxin in terms of promotion of stem growth______________?


aGibberellins


bCytokinins


cAbscisic Acid


dnone of these.


View Answer Abscisic Acid

Gibberellins may be substituted for ___________ light, therefore promote flowering in long day plants?


aWhite


bRed


cBlue


dGreen


View Answer Red

Chemically auxins are____________?


aIndole propionic acid.


bIndole carboxylic acid.


cIndole acetaldehyde


dIndole acetic acid.


View Answer Indole acetic acid.

Chlorosis, i.e., yellowish hue on the leaves results from_____________?


aAccumulation of toxic waste products in leaves.


bDeficiency of chlorophyll.


cShort supplies of mineral nutrients in the soil.


dAll of these


View Answer All of these

Which of the following tracheophytes are leafless?


aPsilopsida


bLycopsida


cSphenopsida


dPrteropsida


View Answer Psilopsida

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