Define hygroscopic water.
Important Questions on Natural Resources
Given below are sets of five terms each. Rewrite the terms in correct order in a logical sequence beginning with the first word that is underlined:
Root hair, Endodermis, Epidermis, Xylem, Cortex.
Identify the correct pair of statements from the following:
(I) The attraction between two water molecules in xylem vessels is called 'adhesion'.
(II) The number of molecules of absorbed is more than the number of , molecules released when one molecule of triolein is completely oxidized in respiration.
(III) Bacillus mycoides is a nitrifying bacterium.
(IV) Continuous system of cell walls and intercellular spaces in plant tissue is called 'apoplast'.
The correct answer is:
Recognise the figure and find out the correct matching :
| Apoplast pathway | Symplast pathway | |
|---|---|---|
| (i) | It consists of non-living parts of plant body, cell walls and intercellular spaces | It consists of living parts of plant body, , protoplasts connected by plasmodesmata |
| (ii) | There is little resistance in the movement of water | Some resistance occurs in the movement of water through symplast |
| (iii) | It is slightly slower | It is faster |
| (iv) | Metabolic state of root directly affects apoplast pathway | Metabolic state of root does not affect symplast pathway |
Which of the given differences is/are incorrect?
Given below is the pathway of water movement in the root. Identify A, B, C, and D in the given diagram.
In which of the following, passive absorption of water is not seen in?
The primary function of Casparian strips is to:
A. Force water and minerals through the membranes of endodermal cells.
B. Prevent entry of water into stele directly through the apoplast.
C. Provide regulation for water and minerals movement in the plant.
1. The thread-like cytoplasmic strands, running from one cell to other is known as plasmodesmata.
2. Xylem and phloem constitute the vascular bundle of the stem.
3. The first formed xylem elements are described as metaxylem.
4. Radial vascular bundles are mainly found in the leaves.
