Biology MCQs

Page No. 49

Type of sensations carried by nociceptors are_________________?


aTouch

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bTemperature

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cPressure

✖


dPain

✓


View Answer Pain

Which type of the receptors are present in the ear__________________?


aChemoreceptors

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bMechanoreceptors

✓


cPhotoreceptors

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dThermoreceptors

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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

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bRed

✓


cBlue

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dGreen

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View Answer Red

Chemically auxins are____________?


aIndole propionic acid.

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bIndole carboxylic acid.

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cIndole acetaldehyde

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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.

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bDeficiency of chlorophyll.

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cShort supplies of mineral nutrients in the soil.

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dAll of these

✓


View Answer All of these

Which of the following tracheophytes are leafless?


aPsilopsida

✓


bLycopsida

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cSphenopsida

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dPrteropsida

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View Answer Psilopsida

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