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Get Answers to all your Questions
- #Structural Organisation in Animals and Plants
- #Biology
- #Medical
- #National Eligibility Cum Entrance Test
- #National Eligilibility Cum Entrance Test
Root hairs develop from the region of :
- Option 1)
Maturation
- Option 2)
Elongation
- Option 3)
Root cap
- Option 4)
Meristematic activity
Answers (1)
As discussed in
Internal Structure (Anatomy) of Dicot Roots -
- Epiblema single layer, cuticle and stomata are absent, unicellular roots hairs are present.
- Epiblema is also known as rhizodermis or piliferous layer. Root hairs are present in maturation zone of root, cells of epiblema which develop roots hair called trichoblast.
No. of root hairs in cortex is made up of parenchymatous cell. - Chloroplast is absent but present in plant cell and trapa so they are photosynthetic.
- Endodermis is present between cortex and pericycle casparian strips are present on vodial and tangential wall of endodermis. Infront of protoxylem cells lack casparian strips. These are called passage cells/transfusion cell.
- Endodermis acts as a water tight jacket.
- Pericycle is single layered and composed of prosenchyma
- Lateral roots originate from pericycle. Adventitious roots originate from phloam parenchymal(endogonous)
- Vascular bundle are radial and exarch.
- Pith is absent or less.
- wherein
Root hairs develop from maturation zone.This option is incorrect.
Option 1)
Maturation
This option is correct.
Option 2)
Elongation
This option is incorrect.
Option 3)
Root cap
This option is incorrect.
Option 4)
Meristematic activity
This option is incorrect.
View full answer
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