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Question-1
Richmond Lang effect was found on the leaves of
(A)
Riccia
(B)
Funaria
(C)
Pharbitis
(D)
Xanthium
Question-2
Sleep movements of leaves in some plants, are due to
(A)
Excess of respiration
(B)
Excess of transpiration
(C)
Leaves stop photosynthesis
(D)
Osmotic changes at the base of leaves.
Question-3
Parthenocarpic development of fruit is brought about by
(A)
2, 4-D
(B)
2,4,5-T
(C)
NAA, 2-T
(D)
NAA, 2, 4-D
Question-4
Which of the following reduces plant growth and induces dormancy?
(A)
Auxin
(B)
Xyline
(C)
Cytokinin
(D)
Abscisic acid
Question-5
Giibberellins cause
(A)
Cell division
(B)
Initiation of lateral roots
(C)
Elongation of internodes
(D)
None of these
Question-6
Thigmotropism is best exhibited by
(A)
Root apex
(B)
Tendrils
(C)
Thorns
(D)
Lamina
Question-7
In plants, auxins are prepared from
(A)
Cortex
(B)
Xylem cells
(C)
Phloem cells
(D)
Root and shoot tips
Question-8
Gibberellin is obtained from
(A)
Alternaria Solani
(B)
Fusarium moliniferum
(C)
Gibberella fujikuroi
(D)
Phytopthora infestans
Question-9
'ABA' is involved in
(A)
shoot elongation
(B)
root elongation
(C)
dormancy of seeds
(D)
increased cell division
Question-10
The word chromosome was coined by
(A)
Waldeyer
(B)
Hofmeister
(C)
Robert hooke
(D)
Strassburger
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Plus 2 Biology Science
ICSE/ISC
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