344712
Choose the correct option. A. The natural reservoir of phosphorus is air, which contains phosphorus in the form of phosphates B. Herbivores and other animals obtain phosphorus from plants.
1 A is wrong
2 B is wrong
3 Both are incorrect
4 Both are correct
Explanation:
The natural reservoir of phosphorus is rock, which contains phosphorus in the form of phosphates.
BIOXII14: ECOSYSTEM
344713
Which of the following is the best description of energy and matter (nutrients) in an ecosystem?
1 Energy is cycled; nutrient flow is unidirectional
2 Nutrients are cycled; energy flow is unidirectional
3 Energy can be converted into matter; matter cannot be converted into energy
4 Matter is used in ecosystems; energy is not used in ecosystems.
Explanation:
Nutrients are cycled between the biotic factors and the abiotic environment (nutrient cycling or biogeochemical cycles). Energy flow is unidirectional, from lower to higher trophic levels
BIOXII14: ECOSYSTEM
344714
Statement A : Carbon constitutes 49 per cent of dry weight of organisms and is next only to chlorine. Statement B : \({\rm{4 \times 1}}{{\rm{0}}^{{\rm{13}}}}{\rm{\;kg}}\) of carbon is fixed annually in the biosphere through photosynthesis.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Carbon constitutes 49 per cent of dry weight of organisms and is next only to water.
BIOXII14: ECOSYSTEM
344715
The natural reservoir of phosphorus is
1 Rocks
2 Soil solution
3 Detritus
4 Atmosphere
Explanation:
Phosphorus is a major constituent of biological membranes, nucleic acids and cellular energy transfer systems. Many animals also need large quantities of this element to make shells, bones and teeth. The natural reservoir of phosphorus is rock, which contains phosphorus in the form of phosphates.
344712
Choose the correct option. A. The natural reservoir of phosphorus is air, which contains phosphorus in the form of phosphates B. Herbivores and other animals obtain phosphorus from plants.
1 A is wrong
2 B is wrong
3 Both are incorrect
4 Both are correct
Explanation:
The natural reservoir of phosphorus is rock, which contains phosphorus in the form of phosphates.
BIOXII14: ECOSYSTEM
344713
Which of the following is the best description of energy and matter (nutrients) in an ecosystem?
1 Energy is cycled; nutrient flow is unidirectional
2 Nutrients are cycled; energy flow is unidirectional
3 Energy can be converted into matter; matter cannot be converted into energy
4 Matter is used in ecosystems; energy is not used in ecosystems.
Explanation:
Nutrients are cycled between the biotic factors and the abiotic environment (nutrient cycling or biogeochemical cycles). Energy flow is unidirectional, from lower to higher trophic levels
BIOXII14: ECOSYSTEM
344714
Statement A : Carbon constitutes 49 per cent of dry weight of organisms and is next only to chlorine. Statement B : \({\rm{4 \times 1}}{{\rm{0}}^{{\rm{13}}}}{\rm{\;kg}}\) of carbon is fixed annually in the biosphere through photosynthesis.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Carbon constitutes 49 per cent of dry weight of organisms and is next only to water.
BIOXII14: ECOSYSTEM
344715
The natural reservoir of phosphorus is
1 Rocks
2 Soil solution
3 Detritus
4 Atmosphere
Explanation:
Phosphorus is a major constituent of biological membranes, nucleic acids and cellular energy transfer systems. Many animals also need large quantities of this element to make shells, bones and teeth. The natural reservoir of phosphorus is rock, which contains phosphorus in the form of phosphates.
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BIOXII14: ECOSYSTEM
344712
Choose the correct option. A. The natural reservoir of phosphorus is air, which contains phosphorus in the form of phosphates B. Herbivores and other animals obtain phosphorus from plants.
1 A is wrong
2 B is wrong
3 Both are incorrect
4 Both are correct
Explanation:
The natural reservoir of phosphorus is rock, which contains phosphorus in the form of phosphates.
BIOXII14: ECOSYSTEM
344713
Which of the following is the best description of energy and matter (nutrients) in an ecosystem?
1 Energy is cycled; nutrient flow is unidirectional
2 Nutrients are cycled; energy flow is unidirectional
3 Energy can be converted into matter; matter cannot be converted into energy
4 Matter is used in ecosystems; energy is not used in ecosystems.
Explanation:
Nutrients are cycled between the biotic factors and the abiotic environment (nutrient cycling or biogeochemical cycles). Energy flow is unidirectional, from lower to higher trophic levels
BIOXII14: ECOSYSTEM
344714
Statement A : Carbon constitutes 49 per cent of dry weight of organisms and is next only to chlorine. Statement B : \({\rm{4 \times 1}}{{\rm{0}}^{{\rm{13}}}}{\rm{\;kg}}\) of carbon is fixed annually in the biosphere through photosynthesis.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Carbon constitutes 49 per cent of dry weight of organisms and is next only to water.
BIOXII14: ECOSYSTEM
344715
The natural reservoir of phosphorus is
1 Rocks
2 Soil solution
3 Detritus
4 Atmosphere
Explanation:
Phosphorus is a major constituent of biological membranes, nucleic acids and cellular energy transfer systems. Many animals also need large quantities of this element to make shells, bones and teeth. The natural reservoir of phosphorus is rock, which contains phosphorus in the form of phosphates.
344712
Choose the correct option. A. The natural reservoir of phosphorus is air, which contains phosphorus in the form of phosphates B. Herbivores and other animals obtain phosphorus from plants.
1 A is wrong
2 B is wrong
3 Both are incorrect
4 Both are correct
Explanation:
The natural reservoir of phosphorus is rock, which contains phosphorus in the form of phosphates.
BIOXII14: ECOSYSTEM
344713
Which of the following is the best description of energy and matter (nutrients) in an ecosystem?
1 Energy is cycled; nutrient flow is unidirectional
2 Nutrients are cycled; energy flow is unidirectional
3 Energy can be converted into matter; matter cannot be converted into energy
4 Matter is used in ecosystems; energy is not used in ecosystems.
Explanation:
Nutrients are cycled between the biotic factors and the abiotic environment (nutrient cycling or biogeochemical cycles). Energy flow is unidirectional, from lower to higher trophic levels
BIOXII14: ECOSYSTEM
344714
Statement A : Carbon constitutes 49 per cent of dry weight of organisms and is next only to chlorine. Statement B : \({\rm{4 \times 1}}{{\rm{0}}^{{\rm{13}}}}{\rm{\;kg}}\) of carbon is fixed annually in the biosphere through photosynthesis.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Carbon constitutes 49 per cent of dry weight of organisms and is next only to water.
BIOXII14: ECOSYSTEM
344715
The natural reservoir of phosphorus is
1 Rocks
2 Soil solution
3 Detritus
4 Atmosphere
Explanation:
Phosphorus is a major constituent of biological membranes, nucleic acids and cellular energy transfer systems. Many animals also need large quantities of this element to make shells, bones and teeth. The natural reservoir of phosphorus is rock, which contains phosphorus in the form of phosphates.