Chapter 26 - Some Major Ecosystem - 2

Chapter 26 - Some Major Ecosystem - 2

1. Deserts generally occur in region where annual rain fall is less than:

a) 15 – 20 cm
b) 5 – 10 cm
c) 25 – 50 cm
d) 250 – 270 cm

2. Cacti and euphorbia are desert plants which store water in their:

a) Stem
b) Buds
c) Root
d) Leaves

3. Primary consumer animals may also be called as:

a) Herbivores
b) Carnivores
c) Omnivores
d) Decomposers

4. Limnetic phytoplanktons include:

a) Protozoan
b) Rotifers, fishes and planktons
c) Crustaceans
d) Cynobacteria

5. The zone of deep standing water under the limnetic zone is known as:

a) Profundal zone
b) Limnetic zone
c) Littoral zone
d) Benthic zone

6. In temperate grassland the rate of primary production is about:

a) 1000 – 2000 g/m² Annually
b) 8000 – 18000 g/m² Annually
c) 100 – 600 g/m² Annually
d) 700 – 1500 g/m² Annually

7. Which of the following is not correctly matched:

a) Herbivores : Autotroph
b) Producer : Plants
c) Carnivores : Consumer
d) Producer : Autotroph

8. Distribution of biomes on earth is primarily due to patterns of:

a) Wind and soil
b) Soil and animal
c) Animal and predators
d) Temperature and rainfall

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