The type of venation in which veins are irregularly branched is ___________ venation (parallel/reticulate).

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Solution

Venation:
The arrangement of veins in the lamina of a leaf is called venation.
Parallel venation and reticulate venation are the two types of venation.
Veins are arranged parallel to one another in parallel venation while the veins are arranged in an irregular manner in reticulate venation.
Reticulate venation:
The type of venation in which veins and veinlets originating from the midrib are arranged in an irregular manner forming a web-like structure is called reticulate venation.
Reticulate venation is observed in dicotyledonous plants.
Examples: china rose, mango, tulsi.
Final answer: The type of venation in which veins are irregularly branched is reticulate venation.

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Maize plant has
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Question 1

Which of the following combination of features would you observe in grass?
(a) Parallel venation and fibrous root.
(b) Parallel venation and taproot.
(c) Reticulate venation and fibrous root.
(d) Reticulate venation and taproot.

Reticulate venation is found in dicot leaves while in monocot leaves venation is of parallel type. Biology being a 'Science of exceptions', find out any exception to this generalisation.

Assertion: Tamarind plant has reticulate venation.
Reason: In reticulate venation, the veins in a leaf occur in an irregular way forming a net-like design.

Q. Which of the following combination of features would you observe in grass? Explain.
(a) Parallel venation and fibrous root.
(b) Parallel venation and taproot.
(c) Reticulate venation and fibrous root.
(d) Reticulate venation and taproot.

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