Ecosystem Questions
Several processes occur simultaneously during decomposition of detritus. choose incorrect option for catabolism and fragmentation.
Stratification is :-
Assertion (A) : The decomposition rate is slower when detritus contains substances like lignin and chitin. Reason (R) : Lignin and chitin are highly resistant to microbial action and undergo very slow decomposition. Which of the following is correct?
Which one of the following statements is incorrect regarding ecosystem?
Which of the following ecosystem has the highest contribution to global net primary productivity?
What are flocs?
Match the following Column-I Column-II
In the equation: GPP is Gross Primary Productivity NPP is Net Primary Productivity R here i
Which one of the following processes during decomposition is correctly described?
Given below are two statements:- Statement I : Gause's competitive exclusion principle states that two closely related species competing for different resources cannot co-exist indefinitely. Statement II : According to Gause's principle, during compe
The diagram below represents a crucial step in decomposition of detritus being performed by an organism. Choose the correct option related to it.
Identify the incorrect statement.
Consider the following sentences: I. Anaerobic bacteria and fungi form mesh-like structures. II. Bacteria and fungi form a mesh-like structure in an air-contained sludge digester tank. III. Mixture of gases IV. Primary sludge before biological treatm
Identify true (T) or false (F) statements and select the correct option. a. Tropical rainforest and sugarcane field are the most productive ecosystems. b. Secondary productivity is the rate of formation of new organic matter by consumers. c. Humus is
Pyramid of biomass and energy in ocean for a typical grazing food chain would be
Which of the following statements is true for the given ecological pyramid?
Below diagram represents age pyramids of human population. In which a, b & c represent triangular, Bell shaped and Urn shaped age pyramids of the following statement is true
Which one of the following has the largest population in a food chain in most ecosystems?
The correct sequence of components of a forest ecosystem from top to bottom strata is;
Natural reservoir of phosphorus is:
Which of the following is a sedimentary cycle?
The average price tag for ecosystem services is estimated at:
The cost of climate regulation and habitat for wildlife is estimated at:
Out of the total cost of various ecosystem services, soil formation accounts for:
Who tried to put price tags on nature’s life-support services?
The products of ecosystem processes are named as:
A major difference between carbon and phosphorus cycles is:
In the phosphorus cycle, phosphate is released from rocks by:
The major reservoir of phosphorus is:
Which of the following is NOT a way carbon returns to the atmosphere?
Reservoir for the sedimentary cycle is:
An example of a gaseous nutrient cycle is:
The amount of nutrients present in the soil at any given time is:
Sequence of communities in Hydrarch succession is:
The pioneer species in Xerarch succession are:
The climax community in both Hydrarch and Xerarch succession is:
Succession in water bodies is called:
The entire sequence of communities that successively change in a given area are called:
Which of the following is a characteristic of secondary succession?
Succession that starts in an area where no living organisms ever existed is:
Which of the following is NEVER inverted?
An inverted pyramid of biomass is typically found in:
The number of trophic levels in the GFC is restricted as per the:
The mass of living material in a trophic level at a particular time is called:
According to the 10% law, if producers have 1000 J of energy, how much is available to secondary consumers?
Identify the organism at the Fourth Trophic Level (TC):
Specific place of the organisms in the food chain is called:
In a terrestrial ecosystem, a much larger fraction of energy flows through the:
Detritus Food Chain (DFC) begins with:
Unidirectional flow of energy occurs from: