TRANSPORT IN PLANTS biology MCQ’s questions answers

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TRANSPORT IN PLANTS

Question 21 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Phytohormone connected with closing of stomata is ..... [BHU 2002]
A
ABA
B
Kinetin
C
GA
D
IBA
Question 22 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A cell kept in a solution increases in volume. The solution is ..... [Pb. PMT 2001]
A
Hypotonic
B
Isotonic
C
Hypertonic
D
Either a or b
Question 23 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Stomatal opening and closing is due to ..... [AFMC 2011]
A
Change is turgidity of guard cells
B
Cellulose microfibril of guard cells are oriented radially
C
The inner wall of each guard cell is thick and less elastic
D
All the above
Question 24 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When half the leaves are removed randomly, transpiration will show ..... [JIPMER 1999]
A
Higher magnitude but lower flux or rate per unit
B
Lower magnitude but higher flux
C
Both magnitude and flux increase
D
Both magnitude and flux decrease
Question 25 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
At constant temperature, the rate of transpiration will be higher at ..... [CBSE 1992]
A
Sea level
B
1 km below sea level
C
1 km above sea level
D
1.5 km above sea level
There are 25 questions to complete.

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