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Question-1
The ultimate cause for the movement of water against gravity in a tree is
(A)
Osmosis
(B)
Imbibition
(C)
Transpiration
(D)
Photosynthesis
Question-2
Stomata opens with the influx of
(A)
Na+ ions
(B)
K+ ions
(C)
Ca2+ions
(D)
Mg2+ ions
Question-3
Primitive types of stomata are found in
(A)
Apophysis of capsule
(B)
Leaves of moss plants
(C)
Axes of moss plants
(D)
Submerged hydrophytes
Question-4
Water is transpired from the leaf mesophyll cells. They develop a lower water potential than the
(A)
Root xylem sap
(B)
Stem xylem sap
(C)
Leaf xylem sap
(D)
Stem phloem sap
Question-5
Root pressure is due to
(A)
Active absorption
(B)
Passive absorption
(C)
Increase in transpiration
(D)
Decrease in transpiration
Question-6
Which of the following plant has sunken stomata?
(A)
Nerium
(B)
Hydrilla
(C)
Mango
(D)
Guava
Question-7
For 'ascent of sap', the root pressure theory was proposed by
(A)
Bose
(B)
Molish
(C)
Priestly
(D)
Godlewski
Question-8
When water enters in the cells of plants, due to diffusion, it is termed as
(A)
Osmosis
(B)
Endocytosis
(C)
Active absorption
(D)
Passive absorption
Question-9
Stem in higher plants transport water and minerals from
(A)
Roots to the stems
(B)
Stems to the roots
(C)
Leaves to the roots
(D)
Roots to the leaves
Question-10
Transpiration is helpful for plants in
(A)
Cooling the plant
(B)
Loss of excess of water
(C)
Upward conduction of water
(D)
Loss of excess of nutrients
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Plus 2 Biology Science
ICSE/ISC
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