Which of the following is not a primary coloniser?

Related Mcqs:

1. Which of the following habitats is most unsuitable for primary productivity:

   A. Meadow
   B. Forested river bank
   C. Cave
   D. Pond

2. The gross primary production is maximum in the following ecosystem:

   A. Open sea
   B. Grasslands and pastures
   C. Coniferous forests
   D. Tropical and sub-tropical forest

3. The primary productivity is minimum in the following ecosystem:

   A. Tropical rainforest
   B. Temperate grassland
   C. Tropical deciduous forest
   D. Desert shrub

4. Which of the following ecosystem has highest gross primary productivity:

   A. Grassland
   B. Coral reefs
   C. Mangroves
   D. Rain forest

5. The primary succession refers to the development of communities on a:

   A. Freshly cleared crop field
   B. Forest clearing after devastating fire
   C. Pons, freshly filled water after a dry phase
   D. Newly-exposed habitat with no record of earlier vegetation

6. Primary succession refers to the development of communities on a:

   A. Pond freshly filled with water after a dry phase
   B. Freshly cleared crop fields
   C. Newly exposed habitat with no record of earlier vegetation
   D. Forest clearing after devastating free

7. Which is a primary consumer?

   A. Scavenger
   B. Saprophyte
   C. Carnivore
   D. Herbivore

8. According to Odum, the percentage of net primary production of total light intake is:

   A. 10%
   B. 0.15%
   C. 1%
   D. 1.50%

9. The efficiency of primary production in an ocean is:

   A. 5%
   B. 3.50%
   C. 1%
   D. 0.20%

10. Aerosols reduce primary productivity by:

    A. Decreasing O2
    B. Reducing photosynthesis
    C. Competing with CO2
    D. Being toxic to chloroplasts