Select the correct events leading to the opening of the stomata
a. Decline in guard cell solutes
b. Lowering of osmotic potential of guard cells
c. Rise in potassium levels in guard cells
d. Movement of water from neighbouring cells into guard cells
e. Guard cells becoming flaccid
|
Water is lost in a liquid state in some plants through hydathodes. These hydathodes |
Answer |
|
Passive absorption of water by the root system is the result of |
Answer |
|
Study the following table: (I) Peperomia - Leaf succulent - Leaf epidermal cells store water (II) Calotropis - Non-succulent - Root cells with thickened cell walls (III) Tribulus - Ephemeral - Stem stores water (IV) Ammophila - Dicot plant - Rolling in of leaves to check water loss Identify the correct pair of answers. |
Answer |
|
In which of the following plants, there will be no transpiration? |
Answer |
|
A leaf peeling of Tradescantia is kept in a medium having 10% NaCl. After a few minutes if we observe the leaf peel under the microscope, we are likely to see |
Answer |
|
Which one of the following is used for measuring the rate of transpiration? |
Answer |
|
The existence of root pressure can be demonstrated by |
Answer |
|
Cell membrane is ________. |
Answer |
|
"Pulsation theory" to explain ascent of sap was proposed by |
Answer |
|
A cell placed in hypertonic solution plasmolysis; the space between the cell wall and plasmolysed contents is filled with |
Answer |