Question

Parallel venation is observed mostly in :
a) Monocot plants
b) Dicot plants
c) Thallophytes
d) Bryophytes

Answer 1

Hint:Venation is the arrangement of veins in the lamina of the leaf surface.In parallel venation the veins are arranged parallel to one another all over the lamina.

Complete answer:
Let’s discuss given options and find the correct answer:

a. Venation is the arrangement of veins in a very leaf. Parallel Venation is the condition within which the secondary veins run parallel to each various and unit of measurement that's connected laterally by minute and even by straight veinlets. This type of venation is usually seen in monocots, for example, grass.

b. Dicot leaves don't seem to be as linear in form as angiosperm leaves, and their vascular structures kind net-like veins, rather than parallel ones. This reticulate venation pattern typically has one in all 2 appearances. A leaf with a pinnate pattern (like a feather) features a central vein running down the center of the leaf with alternative veins branching off to either aspect of it. A leaf with a palmate pattern has veins branching out from one one to create a form resembling the palm of a hand.

c. Thallophytes unite a polyphyletic cluster of non-motile organisms traditionally diagrammatical as "thalloid plants", "relatively straightforward plants" or "lower plants". They sort of associate an abandoned division of plant kingdom that embrace fungi, lichens and microorganism and often bryophytes, bacteria and slime moulds.

d. Bryophytes, an informal cluster consisting of three divisions of non-vascular land plants: the liverworts, hornworts and mosses. they are characteristically restricted in size and like damp habitats although they're going to survive in drier environments. The bryophytes incorporate twenty thousand plant species.

Hence option ‘a’ is the correct answer.

Note:Venation is of three types, reticulate, parallel and furcate venation. In reticulate venation, veins form the network like structure. Monocot contains a single cotyledon in its embryo whereas dicot contains two cotyledons in its embryo.