Advertisements
Advertisements
प्रश्न
A few RBC’s were kept in three test tubes containing isotonic, hypotonic and hypertonic solutions. What will be the expected observations after a few hours? Explain.
Advertisements
उत्तर
The shape and size of the cells will remain unchanged in isotonic solution, because the cells will neither loose nor gain water in it.
Cells will swell up in hypotonic solution as water will enter in it due to endosmosis.
Cells will shrink in hypertonic solution as water will move out of the cell due to exosmosis.
APPEARS IN
संबंधित प्रश्न
The process by which root hairs absorb water from the soil.
Explain why:
Raisins swell up in water.
The alongside diagram A shows a root hair growing through the soil particles. Diagram B is the root hair of an aquatic plant.
(i) Name the parts 1,2,3.
(ii) Name two substances which enter the root hair. What are their uses?
(iii) By what process do these substances enter the root hair?
(iv) Account for the different shapes of root hairs in the two diagrams.
Name the following:
Water is absorbed from the soil by which part.
Name the following:
The kind of cells that constitute the cortex of a root.
Give Technical Term for the following.
The tissue responsible for the ascent of sap in plants.
A thin strip of epidermal cells of a leaf was observed in a drop of water. They all looked turgid and normal.
(a) Draw a diagram of such a cell.
(b) Draw a diagram of a cell if this strip is transferred to a strong concentrated solution of sugar. What is term used for the effect on the cells ?
Minerals cannot be passively absorbed by the roots.
In soil which of the following type of water is available for absorption by plant roots?
Draw a neat and proportionate diagram of root hair and label mitochondria, nucleus and vacuole.
