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प्रश्न
Mention whether the following statement is true (T) or false (F) and give an explanation in support of your answer.
Soaked seeds burst into three seed coats.
Mention whether the following statement is true (T) or false (F) and give an explanation in support of your answer.
Soaked seeds burst their seed coats.
पर्याय
True
False
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उत्तर
This statement is true.
Explanation:
Yes, it is true that soaked seeds burst into three seed coat layers for germination. In some plants, the surface layer, middle layer, and inner layer make up a three-layered seed coat. So, when they are soaked in water, water is imbibed into the seeds and the seeds swell up, exerting pressure on the seed coat and burst the seed coats.
संबंधित प्रश्न
A plant cell may burst when :
Differentiate between the following:
Turgidity and Flaccidity
What is the difference between ‘flaccid’ and ‘turgid’? Give one example of flaccid condition in plants.
Give reasons for the following:
If you sprinkle some common salt on grass growing on a lawn, it is killed at that spot.
Give reason for the following:
It is better to transplant seedlings in a flower-bed in the evening and not in the morning.
Differentiate between the following
Turgor pressure and Root pressure
Name the following:
The process by which wilting or drooping of leaves occurs.
Fill in the Blank
Wilting and drooping of leaves is due to loss of ________.
Addition of salt to pickles is a method of killing the bacteria by ______.
The figure given below is a diagrammatic representation of a part of the cross-section of the root in the root hair zone. Study the same and then answer the questions that follow:
- The parts labelled as 1, 2, 3 and 4 are:
- Root hair, Xylem vessel, Soil particles, Cortex respectively.
- Xylem vessel, Soil particles, Root hair, Cortex respectively.
- Root hair, Xylem vessel, Cortex, Soil particles respectively.
- Cortex, Soil particles, Xylem vessel, Root hair respectively.
- The process that enables the passage of water from soil into the root hair is:
- Diffusion
- Active transport
- Osmosis
- Passive absorption
- The kind of force which exists between a liquid and any surface is called as:
- Cohesive force
- Adhesive force
- Capillarity
- Suction force
- The kind of force between the same kind of liquid molecules is:
- Capillary force
- Transpirational pull
- Adhesive force
- Cohesive force
- Sometimes exudation of water occurs from the margin of the leaves in the early morning or night. It is termed as:
- Transpiration
- Guttation
- Bleeding
- Osmosis
