Ecosystem

Match List I with List II :

1. A-III, B-I, C-II, D-IV
2. A-I, B-II, C-III, D-IV
3. A-III, B-I, C-IV, D-II
4. A-I, B-III, C-IV, D-II

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

1. Statement I is correct but statement II is incorrect
2. Statement I is incorrect but statement II is correct
3. Both statement I and statement II are correct
4. Both statement I and statement II are incorrect

Which of the following is the unit of productivity of an Ecosystem?

1. kcal m-3
2. (kcal m-2) yr-1
3. g m-2
4. kcal m-2

In the equation GPP - R = NPP GPP is Gross Primary Productivity NPP is Net Primary Productivity R here is .

1. Respiratory quotient
2. Respiratory loss
3. Reproductive allocation
4. Photosynthetically active radiation

The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called

1. Net primary production
2. Secondary production
3. Primary production
4. Gross primary production

In the equation GPP - R = NPP R represents :

1. Respiration losses
2. Radiant energy
3. Retardation factor
4. Environmental factor

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

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 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

An association of individuals of different species living in the same habitat and having functional interactions is -

1. Ecological niche
2. Ecosystem
3. Population
4. Biotic community

Vertical distribution of different species occupying different levels in a biotic community is known as :

1. Stratification
2. Pyramid
3. Divergence
4. Zonation

In an ecosystem the rate of production of organic matter during photosynthesis is termed as :

1. Secondary productivity
2. Net Productivity
3. Net primary productivity
4. Gross primary productivity

Secondary productivity is rate of formation of new organic matter by :

1. Parasite
2. Decomposer
3. Producer
4. Consumers

The rate of formation of new organic matter by rabbit in a grassland, is called :

1. Net productivity
2. Gross primary productivity
3. Secondary productivity
4. Net primary productivity

Which one of the following is not a functional unit of an ecosystem?

1. Energy flow
2. Decomposition
3. Productivity
4. Stratification

Which one of the following is one of the characteristics of a biological community?

1. Mortality
2. Sex-ratio
3. Stratification
4. Natality

The biomass available for consumption by the herbivores and the decomposers is called –

1. Standing crop
2. Net primary productivity
3. Gross primary productivity
4. Secondary productivity

Which one of the following ecosystem types has the highest annual net primary productivity ?

1. Temperate evergreen forest
2. Temperate deciduous forest
3. Tropical rain forest
4. Tropical deciduous forest

Which of the following is expected to have the highest value (g/m2/yr) in a grassland ecosystem ?

1. Net production (NP)
2. Secondary production
3. Tertiary production
4. Gross production (GP)

Which is the reason for highest biomass in aquatic ecosystem?

1. Benthonic and brown algae
2. Nanoplankton, blue green algae, green algae
3. Diatoms
4. Sea grass and slime moulds