NEET Biology question
Not in NEET syllabus
Following are the differences between apoplast pathway and symplast pathway.
| | Apoplast pathway | Symplast pathway | |---|---|---| | (i) | It consists of non-living parts of the plant body, i.e., cell walls and intercellular spaces | It consists of living parts of plant body, i.e., 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?
Solution
Rows (i) and (ii) correctly describe the apoplast (non-living, low resistance) and symplast (living, some resistance due to crossing plasmodesmata) pathways. Row (iii) is incorrect — the apoplast pathway, offering less resistance, is actually FASTER, while the symplast pathway (crossing cytoplasm via plasmodesmata) is
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