Ecosystem · Question 24

In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

1. There is no relationship between Gross primary productivity and Net primary productivity
2. Gross primary productivity is always more than net primary productivity
3. Gross primary productivity is always less than net primary productivity
4. Gross primary productivity and Net primary productivity are one and same

Match the trophic levels with their correct species examples in grassland ecosystem. Select the correct option

1. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
2. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
3. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
4. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)

Which of the following ecological pyramids is generally inverted?

1. Pyramid of biomass in a forest
2. Pyramid of biomass in a sea
3. Pyramid of numbers in grassland
4. Pyramid of energy

What type of ecological pyramid would be obtained with the following data? Secondary consumer : 120 g Primary consumer : 60 g Primary producer : 10 g

1. Inverted pyramid of biomass
2. Pyramid of energy
3. Upright pyramid of numbers
4. Upright pyramid of biomass

Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :

1. Grassland
2. Tropical Savannah
3. Temperate Forest
4. Tropical Rain Forest

Which ecosystem has the maximum biomass ?

1. Pond ecosystem
2. Lake ecosystem
3. Grassland ecosystem
4. Forest ecosystem

Which of the following would appear as the pioneer organisms on bare rocks?

1. Lichens
2. Green algae
3. Liverworts
4. Mosses

Which one of the following is a characteristic feature of cropland ecosystem ?

1. Absence of weeds
2. Absence of soil organisms
3. Ecological succession
4. Least genetic diversity

The term ecosystem was coined by :

1. E.P. Odum
2. E. Haeckel
3. E. Warming
4. A.G. Tansley

The primary producers of the deep-sea hydrothermal vent ecosystem are

1. chemosynthetic bacteria
2. coral reefs
3. green algae
4. blue-green algae