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What are root hair? Mention the function performed by the root hair.
Which one of the following is a characteristic NOT related with the suitability of the roots for absorbing water?
Choose the correct answer:
Swelling of wooden doors during rains is caused by ___________
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.
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 :
(i) Name the parts indicated by guidelines ‘1’ to ‘5’
(ii) Is the root hair cell unicellular or multi-cellular?
(iii) Draw a labeled diagram of the root hair cell as it would appear if some fertilizer is added to the soil close to it.
(iv) Name the process responsible for the entry of water molecules from the soil into A1 and then A2.
(v) What pressure is responsible for the movement of water in the direction indicated by arrows?
(vi) How is this pressure set up?
The diagram given below represents the result of an experiment conducted on two freshly taken shoots of a green herbaceous plant. The lower ends dip in the water.
(i) What is the aim of the experiment?
(ii) Some parts of the stem in both the shoots have been removed. Name the conducting tissue in shoot A and in shoot B, that has been removed.
(iii) What are the results of this experiment?
Identify labels x, y, z in the given figure of root showing different regions.
Which part of the root helps in maximum absorption of water and minerals?
Identify the part of the plants which is responsible for maximum absorption of water.
Name the following:
Unicellular outgrowths from the epidermis of roots.
