262997
Pyramid of biomass in a sea is generally inverted because: [NCERT - NC-II-212]
1 Biomass of fishes in far less than phytoplankton
2 Biomass of fishes exceeds that of phytoplankton
3 Due to buoyancy in sea the mass of fishes becomes less
4 Pyramid of biomass in sea in always upright
Explanation:
b The pyramid of biomass in sea is also generally inverted because the biomass of fishes far exceeds that of phytoplankton.
Ecosystem
262998
Decomposition of detritus is slower if : [NCERT - NC-II-208]
1 Detritus is rich in sugar
2 Detritus is rich in nitrogen
3 Both 1 and 2
4 Detritus is rich in chitin
Explanation:
d The rate of decomposition is controlled by chemical composition of detritus and climatic factors. In a particular climatic condition, decomposition rate is slower if detritus is rich in lignin and chitin, and quicker, if detritus is rich in nitrogen and watersoluble substances like sugars. Temperature and soil moisture are the most important climatic factors that regulate decomposition through their effects on the activities of soil microbes. Warm and moist environment favour decomposition whereas low temperature and anaerobiosis inhibit decomposition resulting in build up of organic materials.
Ecosystem
262999
Find the incorrect statements (s)
1 d
2 c, d
3 b, d
4 a, b, c, d
Explanation:
d Standing state vary as per season. For calculation of energy content at a trophic level all organisms belonging to that trophic level are included
Ecosystem
263002
What is correct : [NCERT - NC-II-210]
1 A given speices may occupy more than one trophic level in the same ecosystem
2 A given speices may occupy only one trophic level in the same ecosystem
3 A given species occupies minimum two trophic levels in the same ecosystem
4 A given species occupies maximum two trophic levels in the given ecosystem
Explanation:
a One must remember that the trophic level represents a functional level, not a species as such. A given species may occupy more than one trophic level in the same ecosystem at the same time; for example, a sparrow is a primary consumer when it eats seeds, fruits, peas, and a secondary consumer when it eats insects and worms.
262997
Pyramid of biomass in a sea is generally inverted because: [NCERT - NC-II-212]
1 Biomass of fishes in far less than phytoplankton
2 Biomass of fishes exceeds that of phytoplankton
3 Due to buoyancy in sea the mass of fishes becomes less
4 Pyramid of biomass in sea in always upright
Explanation:
b The pyramid of biomass in sea is also generally inverted because the biomass of fishes far exceeds that of phytoplankton.
Ecosystem
262998
Decomposition of detritus is slower if : [NCERT - NC-II-208]
1 Detritus is rich in sugar
2 Detritus is rich in nitrogen
3 Both 1 and 2
4 Detritus is rich in chitin
Explanation:
d The rate of decomposition is controlled by chemical composition of detritus and climatic factors. In a particular climatic condition, decomposition rate is slower if detritus is rich in lignin and chitin, and quicker, if detritus is rich in nitrogen and watersoluble substances like sugars. Temperature and soil moisture are the most important climatic factors that regulate decomposition through their effects on the activities of soil microbes. Warm and moist environment favour decomposition whereas low temperature and anaerobiosis inhibit decomposition resulting in build up of organic materials.
Ecosystem
262999
Find the incorrect statements (s)
1 d
2 c, d
3 b, d
4 a, b, c, d
Explanation:
d Standing state vary as per season. For calculation of energy content at a trophic level all organisms belonging to that trophic level are included
Ecosystem
263002
What is correct : [NCERT - NC-II-210]
1 A given speices may occupy more than one trophic level in the same ecosystem
2 A given speices may occupy only one trophic level in the same ecosystem
3 A given species occupies minimum two trophic levels in the same ecosystem
4 A given species occupies maximum two trophic levels in the given ecosystem
Explanation:
a One must remember that the trophic level represents a functional level, not a species as such. A given species may occupy more than one trophic level in the same ecosystem at the same time; for example, a sparrow is a primary consumer when it eats seeds, fruits, peas, and a secondary consumer when it eats insects and worms.
262997
Pyramid of biomass in a sea is generally inverted because: [NCERT - NC-II-212]
1 Biomass of fishes in far less than phytoplankton
2 Biomass of fishes exceeds that of phytoplankton
3 Due to buoyancy in sea the mass of fishes becomes less
4 Pyramid of biomass in sea in always upright
Explanation:
b The pyramid of biomass in sea is also generally inverted because the biomass of fishes far exceeds that of phytoplankton.
Ecosystem
262998
Decomposition of detritus is slower if : [NCERT - NC-II-208]
1 Detritus is rich in sugar
2 Detritus is rich in nitrogen
3 Both 1 and 2
4 Detritus is rich in chitin
Explanation:
d The rate of decomposition is controlled by chemical composition of detritus and climatic factors. In a particular climatic condition, decomposition rate is slower if detritus is rich in lignin and chitin, and quicker, if detritus is rich in nitrogen and watersoluble substances like sugars. Temperature and soil moisture are the most important climatic factors that regulate decomposition through their effects on the activities of soil microbes. Warm and moist environment favour decomposition whereas low temperature and anaerobiosis inhibit decomposition resulting in build up of organic materials.
Ecosystem
262999
Find the incorrect statements (s)
1 d
2 c, d
3 b, d
4 a, b, c, d
Explanation:
d Standing state vary as per season. For calculation of energy content at a trophic level all organisms belonging to that trophic level are included
Ecosystem
263002
What is correct : [NCERT - NC-II-210]
1 A given speices may occupy more than one trophic level in the same ecosystem
2 A given speices may occupy only one trophic level in the same ecosystem
3 A given species occupies minimum two trophic levels in the same ecosystem
4 A given species occupies maximum two trophic levels in the given ecosystem
Explanation:
a One must remember that the trophic level represents a functional level, not a species as such. A given species may occupy more than one trophic level in the same ecosystem at the same time; for example, a sparrow is a primary consumer when it eats seeds, fruits, peas, and a secondary consumer when it eats insects and worms.
262997
Pyramid of biomass in a sea is generally inverted because: [NCERT - NC-II-212]
1 Biomass of fishes in far less than phytoplankton
2 Biomass of fishes exceeds that of phytoplankton
3 Due to buoyancy in sea the mass of fishes becomes less
4 Pyramid of biomass in sea in always upright
Explanation:
b The pyramid of biomass in sea is also generally inverted because the biomass of fishes far exceeds that of phytoplankton.
Ecosystem
262998
Decomposition of detritus is slower if : [NCERT - NC-II-208]
1 Detritus is rich in sugar
2 Detritus is rich in nitrogen
3 Both 1 and 2
4 Detritus is rich in chitin
Explanation:
d The rate of decomposition is controlled by chemical composition of detritus and climatic factors. In a particular climatic condition, decomposition rate is slower if detritus is rich in lignin and chitin, and quicker, if detritus is rich in nitrogen and watersoluble substances like sugars. Temperature and soil moisture are the most important climatic factors that regulate decomposition through their effects on the activities of soil microbes. Warm and moist environment favour decomposition whereas low temperature and anaerobiosis inhibit decomposition resulting in build up of organic materials.
Ecosystem
262999
Find the incorrect statements (s)
1 d
2 c, d
3 b, d
4 a, b, c, d
Explanation:
d Standing state vary as per season. For calculation of energy content at a trophic level all organisms belonging to that trophic level are included
Ecosystem
263002
What is correct : [NCERT - NC-II-210]
1 A given speices may occupy more than one trophic level in the same ecosystem
2 A given speices may occupy only one trophic level in the same ecosystem
3 A given species occupies minimum two trophic levels in the same ecosystem
4 A given species occupies maximum two trophic levels in the given ecosystem
Explanation:
a One must remember that the trophic level represents a functional level, not a species as such. A given species may occupy more than one trophic level in the same ecosystem at the same time; for example, a sparrow is a primary consumer when it eats seeds, fruits, peas, and a secondary consumer when it eats insects and worms.
