In a plant organ, which is covered by periderm and the stomata are absent, some gaseous exchange still takes place through
pneumatophores
trichomes
aerenchyma
lenticels
Additional Questions
|
The relationship among different types of soil water can be summed up by the following equation: |
Answer |
|
Water will be absorbed by root hair when |
Answer |
|
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 |
Answer |
|
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 |