Question

In Utricularia, the leaves are modified to form
A. Bladders
B. Tendrils
C. Hooks
D. Pitchers

Answer 1

Hint: The leaves are modified in various plants to form some different structures that perform special kinds of functions according to the unique needs of the plant. Utricularia is an insectivorous plant. Moreover, it is also known as Bladderwort.

Complete step by step answer: Utricularia is also known as the Bladderwort. It is an insectivorous plant. It is called Bladderwort because the leaves are modified into a bladder-like structure that is used to catch and trap the prey. The bladder usually contains nectar. The insects get lured by the nectar and as soon as they enter the bladder of the plant, they get trapped inside it. These plants trap insects to compensate for their nitrogen deficiency. They usually grow in swampy soils which have low nitrogen content. And nitrogen is necessary for the growth of the plant. Thus, these plants become insectivorous to fulfill their deficit. And to perform that function the leaves are modified. Thus, in Utricularia, the leaves are modified to form the bladders.
Hence, the correct answer is option (A).
Additional Information:
Some commonly seen modifications of leaves in various plants are –
1. Tendrils – Leaves are modified to form tendrils to help the plant climb. Example – Garden Pea, Gloriosa, etc.
2. Spine – Leaves are modified to form spines for self-defense. Example – Opuntia, Aloe vera, etc.
3. Fleshy leaves – Leaves store food and water. Example – Bryophyllum, Begonia, etc.
4. Phyllode – Leaves degenerate after maturation and the petiole persists which becomes flat, green, and fleshy. Example – Australian acacia etc.
5. Pitcher – Leaves are modified to form the pitcher to trap the insects. Example – Nepenthes etc.

Note: Utricularia is an insectivorous or carnivorous plant. In all the insectivorous plants the leaves are modified to devise special means to catch and trap the prey. With normal leaves, this is not possible so the leaves are modified into pitchers, bladders, cages, etc. so that the prey can be trapped inside them.