891. Chlorosis, i.e., yellowish hue on the leaves results from_____________?
A. Accumulation of toxic waste products in leaves.
B. Deficiency of chlorophyll.
C. Short supplies of mineral nutrients in the soil.
D. All of these

892. Chemically auxins are____________?
A. Indole propionic acid.
B. Indole carboxylic acid.
C. Indole acetaldehyde
D. Indole acetic acid.

893. Gibberellins may be substituted for ___________ light, therefore promote flowering in long day plants?
A. White
B. Red
C. Blue
D. Green

894. Which of the following is antagonist to Auxin in terms of promotion of stem growth______________?
A. Gibberellins
B. Cytokinins
C. Abscisic Acid
D. none of these.

895. 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______________?
A. Gibberellins
B. Cytokinins
C. Auxins
D. Ethene.

896. The only promoter of leaf senescence in the following plant hormones is________________?
A. Gibberellins
B. Cytokinins
C. Auxins
D. Abscisic Acid

897. Which of the following is used in brewing industry to promote malting_______________?
A. Gibberellins
B. Cytokinins
C. Auxins
D. Abscisic Acid

898. Which type of the receptors are present in the ear__________________?
A. Chemoreceptors
B. Mechanoreceptors
C. Photoreceptors
D. Thermoreceptors

899. Type of sensations carried by nociceptors are_________________?
A. Touch.
B. Temperature.
C. Pressure.
D. Pain

900. Which type of sensory structures carrying the touch sensations are present in papillae extending into ridges of the fingertips___________________?
A. Hair end organs
B. Meissner’s Corpuscles
C. Pacinian corpuscles
D. None of these

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