In a hydrosphere the plants like Carex, Cyperus, and Juncus appear just after a community comprising:

Related Mcqs:

1. Due to modification of the environment by the plant community itself, when one community is replaced by another suitable community, the succession is called:

   A. Induced
   B. Deflated
   C. Allogenic
   D. Autogenic

2. The woodland stage in a hydrosphere has predominance of plants like:

   A. Eleocharis, Fimbristylis
   B. Salix, Populus
   C. Ranunculus, Polygonum
   D. Acer, Ulmus

3. Mark the pioneer in a hydrosphere:

   A. Diatoms
   B. Najas
   C. Zanichellia
   D. Lemna

4. Hydrosphere starts from:

   A. Water factor
   B. Sand
   C. Mud
   D. Desert

5. The northern mountainous system, comprising the Karakoram, the great _______, is one of the most exciting and important tracts of the world:

   A. Himalayas
   B. Hindu Kush
   C. Both (a) & (b)
   D. None of these

6. The non-green plants are as important as the green plants because they:

   A. Cause human disease
   B. Cause diseases of other plants
   C. Are useful in several industries
   D. Bring about decomposition of dead animals and plant remains

7. Those chemicals which are produced by plants and affect other plants are broadly called:

   A. Depresants
   B. Allomones
   C. Allelochemics
   D. Kairomones

8. Among the plants listed, point out one that does not fit into ecological group represented by the other plants:

   A. Acacia
   B. Aloe
   C. Euphorbia
   D. Rhizophora

9. Among the plants listed, point out one that does not fit into biological group represented by other plants

   A. Euphorbia
   B. Acacia
   C. Vallisneria
   D. Aloe

10. If a piece of land which had a plant community becomes barren due to some external thrust, the succession taking place here is called:

    A. Induced
    B. Deflated
    C. Secondary
    D. Retrogessive