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Which of the following is not a character of collenchyma tissue?
The transverse section of plant part showed polyarch, radial and exarch xylem, with endodermis and pericycle. The plant part is identified as:
Given below are two statements: Statement I: In a dicotyledonous leaf, the adaxial epidermis general bears more stomata than the abaxial epidermis. Statement II: In a dicotyledonous leaf, the adaxially placed palisade parenchyma is made up of elongated cells, which are arranged vertically and parallel to each other. In light of the above statements, choose the correct answer from the options given below:
Which of the following helps in maintenance of the pressure gradient in sieve tubes?
Which of the following ecological pyramids is generally inverted?
The rate of decomposition is faster in the ecosystem due to the following factors, except:
Which of the following statements is incorrect?
In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?
Which of the following statements is not correct?
In the equation GPP – R = NPP, R represents:
The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called:
Frugivorous birds are found in large numbers in tropical forests mainly because of :
Given below are two statements: Statement I: Pyramid of energy is always upright and is the most efficient. Statement II: Pyramid of biomass in sea is generally inverted. In the light of the above statements, choose the most appropriate answer from the options given below:
Which of the following is not correct regarding the decomposition of wastes?
Identify the correct set of statements with regard to the properties of humus.
Detritivores breakdown detritus into smaller particles. This process is called:
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 light of the above statements, choose the correct answer from the options given below:
Identify the correct statements: A: Detrivores 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. Choose the correct answer from the options given below:
In the equation GPP - R = NPP, where GPP is Gross Primary Productivity and NPP is Net Primary Productivity, R here is ___________
Which one of the following is not a limitation of ecological pyramids?