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Practice each question, then open the answer or worked solution.
Which of the following statements does not apply to reverse osmosis?
a. it is used for water purification.
b. In this technique, a pressure greater than the osmotic pressure is
applied to the system
c. It is a passive process
d. It is an active process
Option (c) is the answer.
Which one of the following will not directly affect transpiration?
a. temperature
b. light
c. wind speed
d. chlorophyll content of leaves
Option (d) is the answer.
The lower surface of leaf will have more number of stomata in a
a. dorsiventral leaf
b. isobilateral leaf
c. both a and b
d. none of the above
Option (a) is the answer.
The form of sugar transported through phloem is
a. glucose
b. fructose
c. sucrose
d. ribose
Option (c) is the answer.
The process of guttation takes place
a. when the root pressure is high and the rate of transpiration is low.
b. when the root pressure is low and the rate of transpiration is high
c. when the root pressure equals the rate of transpiration
d. when the root pressure, as well as rate of transpiration, are high.
Option (a) is the answer.
Which of the following is an example of imbibition
a? uptake of water by root hair
b. exchange of gases in stomata
c. swelling of seed when putting in soil
d. opening of stomata
Option (c) is the answer.
When a plant undergoes senescence, the nutrients may be
a. accumulated
b. withdrawn
c. translocated
d. None of the above
Option (c) is the answer.
Water potential of pure water at standard temperature is equal to
a. 10
b. 20
c. Zero
d. None of the above
Option (c) is the answer.
Mycorrhiza is a symbiotic association of a fungus with root system which
helps in
A. Absorption of water
B. Mineral nutrition
C. Translocation
D. Gaseous exchange
Options:
a. Only A
b. Only B
c. both A and B
d. both B and C
Option (c) is the answer.
Based on the figure given below which of the following statements is not
correct?
a. Movement of solvent molecules will take place from chamber A to B.
b. Movement of solute will take place from A to B.
c. Presence of a semipermeable is a pre-requisite for this process to
occur.
d. The direction and rate of osmosis depend on both the pressure
gradient and concentration gradient.
Option (b) is the answer.