Ecosystem PYQ — Page 2

Which of the following ecosystem has the maximum amount of biomass production?

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

Which of the following is correctly matched?

Select the pairs of sedimentary biogeochemical cycles. I. Hydrogen cycle and water cycle II. Phosphorus Cycle and sulphur cycle III. Calcium cycle and magnesium cycle IV. Carbon cycle and nitrogen cycle

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

The term ecosystem was coined by:

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

The mass of living material at a trophic level at a particular time is called:

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

In which of the following both pairs have correct combination?

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

Most animals that live in deep oceanic waters are:

Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks. 

If 20J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain? plant $\rightarrow$ mice $\rightarrow$ snake $\rightarrow$ peacock

Secondary productivity is rate of formation of new organic matter by

Benthic organisms are affected the most by:

The age pyramid with broad base indicates:

Natural reservoir of phosphorus is

When man eats fish which feeds on zooplanktons which have eaten small plants, the producer in this chain is:

Which one of the following processes during decomposition is correctly described?

Which of the following is a primary consumer in maize field ecosytem?

Identify the likely organisms (I, II) (III) and (IV) in the food web shown below  

Identify the possible link A in the following food chain Green plant $\rightarrow$ Insect $\rightarrow$ Frog $\rightarrow$ A $\rightarrow$ Eagle

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