Aerosols reduce primary productivity by:

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 primary productivity is minimum in the following ecosystem:

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

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

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

4. Which ecosystem has the highest primary productivity?

   A. Pond ecosystem
   B. Lake ecosystem
   C. Grassland ecosystem
   D. Forest ecosystem

5. In a sugarcane field the net productivity in terms of kg/m2/year, is:

   A. 0.2-0.4
   B. 2?4
   C. 4?6
   D. 0.6-0.8

6. The bacteria, which reduce nitrates in the soil to gaseous nitrogen, are known as denitrifying bacteria such as:

   A. Nitromonas
   B. Pseudomonas
   C. Nostoc
   D. Rhizobium

7. Deforestation may reduce the chances of:

   A. Rain fall
   B. Frequent cyclones
   C. Erosion of surface soil
   D. Frequent landslides

8. Which are the primary constituents of photochemical smog?

   A. SO2 and CO2
   B. NO2 and hydrocarbons
   C. Carbon di-oxide and NO2
   D. Hydrocarbons and CFCs

9. Which is a primary consumer?

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

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

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