Regulation of stomatal opening - class-XII
Description: regulation of stomatal opening | |
Number of Questions: 38 | |
Created by: Avatara Chahal | |
Tags: transpiration transport in plants botany transport in plant homeostasis biology |
Loss of $k^{+}ions$ causes ......... of turgidity of guard cell.
Transpiration is regulated by the movements of
Loss of $k^{+}$ ion ..... osmotic concentration of guard cells on compared to adjacent epidermal cell
Stomata in angiosperms does not open during
For photoactive opening of stomata, the proton transport concept was given by
What will be the effects on stomata, if relative humidity is $100\%$ in atmosphere?
Which ones regulate stomatal movements
(a) IAA
(b) $GA _3$
(c) Zeatin
(d) ABA.
Stomata opening in most of the plants is during the day instead of night because
Which one keeps its stomata open during night and closed during day?
Which of the following is a plant showing scotoactive opening of stomata?
The proton transport concept for the opening of photoactive stomata was given by
Stomata are bound by a pair of guard cells. Stomata close, when the guard cells become
Increase glucose concentration causes
Malate or K$^{+}$ theory was put forward by
For maintaining the turgidity of guard cells, a continuous supply of .......... is required.
Malate or K$^{+}$ hydrolysis theory was given for
Malate pump hypothesis is ......... theory
Glucose _______ the osmotic concentration of guard cell.
Active K$^+$ mechanism of opening and closing of the stomata was given by
According to sugar concentration theory, during daytime guard cells become
According to sugar concentration theory, during daytime guard cells
According to sugar concentration theory, during daytime water is drawn from adjoining cells due to
According to sugar concentration theory, during ............, the guard cells begin photosynthesis.
According to the sugar concentration theory, during daytime the guard cells become
Who explained the scotoactive opening of stomata?
Stomata opens in the night at alkaline or neutral pH(in the atmosphere of ammonia vapours). This statement was given by
Porometer was developed by :
Which growth hormone is associated with stomatal movements?
Stomata opens by
Consider the following statements.
a. stomata are completely absent in hydrophytes.
b. In hydrophytes, vascular bundles always have bundle sheaths.
Which of the statements given is/are correct?
The opening and closing of stomata in leaves of mesospheric plants is regulated by.
Choose the correct answers from the alternatives given.
Stomata open when guard cells
Choose the correct answers from the alternatives given.
Which of the following changes in the cell sap of the guard cells is responsible for keeping stomata open during day time?
As the guard cells become turgid, outward stretching of their inner walls, open the stomata.
Who explained the mechanism of opening and closing of scotoactive stomata?
The correct hypothesis to explain opening of stomata during night in succulent plants is
According to sugar concentration theory, during daytime, water is drawn from adjoining cells due to
Choose the correct answers from the alternatives given.
Stomata are usually open