In Opuntia, the leaves are modified into:

Related Mcqs:

1. In which type of the forest, humus is formed by the dry and dead leaves:

   A. Coniferous forest
   B. Alpine
   C. Tundra forest
   D. Deciduous forest

2. The leaves are absent in the xerophyte:

   A. Calotropis procera
   B. Zizyphis jujuba
   C. Acacia nilotica
   D. Capparis aphylla

3. Plants growing near sea shore will usually have xerophytic characters, like thick leaves, because:

   A. There is plenty of water in the soil
   B. There is too high a concentration of salts for the plants to absorb sufficient water from the soil
   C. Light available to plant is not sufficient
   D. The soil is muddy

4. Sunken stomata are found in the leaves of:

   A. Nelumbium
   B. Hydrilla
   C. Mango
   D. Nerium

5. Thick cuticles on leaves are typical of plants growing in:

   A. Wet habitats
   B. Warm habitats
   C. Dry habitats
   D. Cool habitats

6. Shapes of crown serve to expose the leaves to sunlight and air. The types of crowns of tree:

   A. Conical
   B. Umbrella
   C. Spherical
   D. Columnar
   E. All of the above

7. Which one of the following is well-developed in hydrophyte?

   A. Aerenchyma
   B. Collenchyma
   C. Stomata
   D. Root system

8. Mycorrhiza is the phenomenon of:

   A. Antagonism
   B. Parasitism
   C. Endemism
   D. Symbiosis

9. When cane plants grown in the forest, they scamble over other vegetation and this corresponds to:

   A. Commensalism
   B. Competition
   C. Exploitation
   D. None of these

10. Plants growing in rock crevices are called:

    A. Sciophytes
    B. Chasmophytes
    C. Helophytes
    D. None of these