NEET Botany Ecosystem Class 12 Questions

Match the column :

How many of the following are the important steps in the process of decomposition? Humification, Anabolism, Fragmentation, Leaching, Mineralisation

Which one of the following is a functional unit of an ecosystem?

In an aquatic ecosystem which type of food chain is major conduit for energy flow is :

Ecological pyramids represent the relationship between the organisms at different trophic levels and they are generally inverted for:

Given below are two statements : Statement I : The primary source of energy in an ecosystem is solar energy. Statement II : The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP). In the light of the above statements, choose the most appropriate answer from the options given below :

Who is known as the father of Ecology in India?

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

Given below are two statements : Statement I : In ecosystem, there is unidirectional flow of energy of sun from producers to consumers. Statement II : Ecosystems are exempted from 2^{nd} law of thermodynamics. In the light of the above statements, choose the most appropriate answer from the options given below :

In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is 100x (kcal m⁻²) yr⁻¹, what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?

Identify the correct statements: A. Detritivores perform fragmentation. B. The humus is further degraded by some microbes during mineralization. C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching. D. The detritus food chain begins with living organisms. E. Earthworms break down detritus into smaller particles by a process called catabolism.

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

Given below are two statements: Statement I: Decomposition is a process in which the detritus is degraded into simpler substances by microbes. Statement II: Decomposition is faster if the detritus is rich in lignin and chitin. In the light of the above statements, choose the correct answer from the options given below:

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

In the equation GPP – R = NPP, R represents:

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

Which of the following ecological pyramids is generally inverted?

Niche is

Which ecosystem has the maximum biomass?

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

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

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

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

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 →snake →peacock

Match the following and select the correct option.

An example of ex situ conservation is

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

The age pyramid with broad base indicates:

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

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