Question

Which one lacks both roots and stomata?
A. Hydrophytes
B. Mesophytes
C. Hygrophytes
D. Halophytes

Answer 1

Hint: The terrestrial plants contain stomata for the exchange of gases. Their roots are well developed to hold the plants with soil. Hydrophytes include submerged or floating plants. The submerged plants do not contain stomata on their leaves.

Complete answer:
-The plants which live completely or partially submerged in fresh water are referred to as hydrophytes. -They do not face a water shortage problem. The extra water is removed from their cells. The floating hydrophyte have broad leaves with large numbers of stomata on the upper surfaces but the stomata are absent in submerged hydrophytic plants.
-The exchange of gases occurs through the general surface in submerged hydrophytes. The special air storage parenchyma and aerenchyma is present in the emergent hydrophytes. It also makes different parts light, spongy and flexible. The exchange of gases with the atmosphere occurs through the stomata present in the emergent regions.
-In hydrophytes, roots are not well developed and it is completely absent in Wolffia.
-Mesophytes are not particularly adapted to dry or wet environments. Their habitat includes rural temperate meadow. It contains stomata and well developed roots.
-Hydrophytes grow in wet environment conditions. These plants present above the ground that’s why they have stomata for the exchange of gases. Their roots are well developed.
-The halophytes grow in soil or water of high salinity. They have normal roots and also many stilt or prop roots which develop from the aerial branches of the stem.
-From the above information we have found that hydrophytes lack both roots and stomata.

Hence, the correct answer is option (A).

Note: Lotus is the example of floating hydrophytes which have stomata on the upper surface. Daisy, clover and Rosa multiflora are some examples of the mesophytes. Mangroves swamps, marshes and sloughs are some examples of halophytes. Cyperus, Oxalis, Junicus and Drosera are some examples of hydrophytes.