Ecosystem · Biology · NEET

Consider the pyramid of energy of an ecosystem given below: If T$$_4$$ is equivalent to $$1000 \mathrm{~J}$$, what is the value at $$\mathrm{T}_1$$ ?...

Which one of the following is not a limitation of ecological pyramids?

In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is $$100 x\left(\mathrm{kcal} \mathrm{~m}^{-2}\right) \mathrm{yr}^{-1}$$,...

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The amount of nutrients such as carbon, nitrogen, potassium and calcium present in the soil at any given time is referred to as :

The species of plants that plays a vital role in controlling the relative abundance of other species in a community is called _________.

Identify the correct statements : A. Detrivores perform fragmentation. B. The humus is further degraded by some microbes during mineralization. C. Wat...

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

Which one of the following statements is NOT correct?

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All successions irrespective of the habitat proceed to which type of climax community?

The pioneer species in a hydrarch succession are

The species that come to appear in bare area are called

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

Two butterfly species are competing for the same nectar of a flower in a garden. To survive and coexist together, they may avoid competition in the sa...

Given below are two statements: Statement I : Decomposition is a process in which the detritus is degraded into simpler substances by microbes. Statem...

Which one of the following will accelerate phosphorus cycle?

Detritivores breakdown detritus into smaller particles. This process is called :

The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as :

Which of the following statements is not correct?

In the equation GPP - R = NPPR represents :

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

Match the trophic levels with their correct species examples in grassland ecosystem. (A) Fourth trophic level   (i) Crow (B) Second tro...

Which of the following ecological pyramids is generally inverted?

Which of the following is the most important cause for animals and plants being driven to extinction?

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

Which ecosystem has the maximum biomass ?

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

The term ecosystem was coined by :

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

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

In which of the following both pairs have correct combination?

During ecological succession :

Most animals that live in deep oceanic waters are -

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

Most animals are tree dwellers in a:

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

Secondary Succession takes place on/in :

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

If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain? Plant → mice → snak...

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

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

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

Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere ?

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

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

Natural reservoir of phosphorus is :

Identify the likely organisms (a), (b), (c) and (d) in the food web shown below : ...

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

The second stage of hydrosere is occupied by plants like

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

Which one of the following is not a gaseous biogeochemical cycle in ecosystem ?

Identify the possible link "A" in the following food chain : Plant → insect → frog →"A"→ Eagle

The upright pyramid of number is absent in

Giiven below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels ? ...

Both, hydrarch and xerarch successions lead to :

Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time ?

The breakdown of detritus into smaller particles by earthworm is a process called

Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?

Which one of the following statements is correct for secondary succession?

Of the total incident solar radiation the proportion of PAR is

Mass of living matter at a trophic level in an area at any time is called :

Which of the following representations shows the pyramid of numbers in a forest ecosystem ? ...

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

Which one of the following types organisms occupy more than one trophic level in a pond ecosystem ?

The correct sequence of plants in hydrosere is :

The slow rate of decomposition of fallen logs in nature is due to their:

About 70% of total global carbon is found in:

Consider the following statements concerning food chains: (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation ...

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

Which one of the following is not used for construction of ecological pyramids ?

An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be having -

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

Which of the following plants are used as green manure in crop fields and in sandy soils ?

Bamboo plant is growing in a far forest then what will be the trophic level of it ?

Plant Decomposers are : -

Which is the reason for highest biomass in aquatic ecosystem ?