The mass of living material at a trophic level at a particular time is called:      
1. Standing state
2. Net primary productivity
3. Standing crop
4. Gross primary productivity

In an ecosystem the rate of production of organic matter during photosynthesis is termed as : 
1. Gross primary productivity
2. Secondary productivity
3. Net productivity
4. Net primary productivity

Secondary Succession takes place on/in :  
1. Degraded forest
2. Newly created pond
3. Newly cooled lava
4. Bare rock

Most animals are tree dwellers in a : 
1. thorn woodland
2. temperate deciduous forest
3. tropical rain forest
4.coniferous forest

The term ecosystem was coined by :
1. E. Warming
2. E.P.Odum
3. A.G. Tansley
4. E. Haeckel

The primary producers of the deep-sea hydrothermal vent ecosystem are
1. coral reefs
2. green algae
3. chemosynthetic bacteria
4.blue-green-algae

Which ecosystem has the maximum biomass
1. Forest ecosystem
2. Grassland ecosystem
3. Pond ecosystem
4. Lake ecosystem

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

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

Niche is
1. all the biological factors in the organism's environment
2. the functional role played by the organism where it lives
3. the range of temperature that the organism needs to live
4. the physical space where an organism lives

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. Upright pyramid of biomass
3. Upright pyramid of numbers
4. Pyramid of energy