260285
Which of the following statements is incorrect?
1 Energy content gradually decreases from first to fourth trophic level
2 Biomass decreases from first to fourth trophic level
3 Energy content gradually increases from first to fourth trophic level
4 Number of individuals decreases from first trophic level to fourth trophic level
Explanation:
According to the $10 \%$ law. only $10 \%$ of the available energy is passed to next trophic level. Rest is used for metabolic processes or as heat. Hence, energy gradually decrease with each level. Biomass is the total mass of organisms at a trophic level. usually with the increase in trophic level, the number of organisms decrease and hence the biomass at that trophic level.
NEET-2020 Phase-II
Ecosystem
260286
Which of the following statements is not correct?
1 Pyramid of numbers in a grassland ecosystem is upright
2 Pyramid of biomass in sea is generally inverted.
3 Pyramid of biomass in sea is generally upright.
4 Pyramid of energy is always upright
Explanation:
The pyramid of biomass in the sea is inverted because the amount of biomass is least at the base of pyramid and the amount of biomass is maximum at the apex of the pyramid. fig.: Inverted biomass pyramid of aquatic ecosystem.
NEET-2021
Ecosystem
260287
Certain characteristic Demographic features of developing countries are -
1 High fertility high density, rapidly rising mortality rate and very young age distribution
2 High infant mortality, low fertility, uneven population growth and a very young age distribution
3 High mortality high density uneven population growth and a very old age distribution
4 High fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution
Explanation:
Developing countries show expanding population Pyramid with maximum age distribution in pre reproductive phase i.e. a very young age distribution high fertility and low mortality rate.
AIPMT-2004
Ecosystem
260288
Which one of the following is not used for construction of ecological pyramids ?
1 Dry weight
2 Number of individuals
3 Rate of energy flow
4 Fresh weight
Explanation:
Common parameters used for constructing ecological pyramids are number of individuals (pyramid of numbers). Dry weight (pyramid of biomass), or rate of energy flow (pyramid of energy) at successive trophic levels. - Ecological pyramids represents the trophic structure and trophic function of an ecosystem. - Fresh weight is not is not used in ecological pyramids
NEET Test Series from KOTA - 10 Papers In MS WORD
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Ecosystem
260285
Which of the following statements is incorrect?
1 Energy content gradually decreases from first to fourth trophic level
2 Biomass decreases from first to fourth trophic level
3 Energy content gradually increases from first to fourth trophic level
4 Number of individuals decreases from first trophic level to fourth trophic level
Explanation:
According to the $10 \%$ law. only $10 \%$ of the available energy is passed to next trophic level. Rest is used for metabolic processes or as heat. Hence, energy gradually decrease with each level. Biomass is the total mass of organisms at a trophic level. usually with the increase in trophic level, the number of organisms decrease and hence the biomass at that trophic level.
NEET-2020 Phase-II
Ecosystem
260286
Which of the following statements is not correct?
1 Pyramid of numbers in a grassland ecosystem is upright
2 Pyramid of biomass in sea is generally inverted.
3 Pyramid of biomass in sea is generally upright.
4 Pyramid of energy is always upright
Explanation:
The pyramid of biomass in the sea is inverted because the amount of biomass is least at the base of pyramid and the amount of biomass is maximum at the apex of the pyramid. fig.: Inverted biomass pyramid of aquatic ecosystem.
NEET-2021
Ecosystem
260287
Certain characteristic Demographic features of developing countries are -
1 High fertility high density, rapidly rising mortality rate and very young age distribution
2 High infant mortality, low fertility, uneven population growth and a very young age distribution
3 High mortality high density uneven population growth and a very old age distribution
4 High fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution
Explanation:
Developing countries show expanding population Pyramid with maximum age distribution in pre reproductive phase i.e. a very young age distribution high fertility and low mortality rate.
AIPMT-2004
Ecosystem
260288
Which one of the following is not used for construction of ecological pyramids ?
1 Dry weight
2 Number of individuals
3 Rate of energy flow
4 Fresh weight
Explanation:
Common parameters used for constructing ecological pyramids are number of individuals (pyramid of numbers). Dry weight (pyramid of biomass), or rate of energy flow (pyramid of energy) at successive trophic levels. - Ecological pyramids represents the trophic structure and trophic function of an ecosystem. - Fresh weight is not is not used in ecological pyramids
260285
Which of the following statements is incorrect?
1 Energy content gradually decreases from first to fourth trophic level
2 Biomass decreases from first to fourth trophic level
3 Energy content gradually increases from first to fourth trophic level
4 Number of individuals decreases from first trophic level to fourth trophic level
Explanation:
According to the $10 \%$ law. only $10 \%$ of the available energy is passed to next trophic level. Rest is used for metabolic processes or as heat. Hence, energy gradually decrease with each level. Biomass is the total mass of organisms at a trophic level. usually with the increase in trophic level, the number of organisms decrease and hence the biomass at that trophic level.
NEET-2020 Phase-II
Ecosystem
260286
Which of the following statements is not correct?
1 Pyramid of numbers in a grassland ecosystem is upright
2 Pyramid of biomass in sea is generally inverted.
3 Pyramid of biomass in sea is generally upright.
4 Pyramid of energy is always upright
Explanation:
The pyramid of biomass in the sea is inverted because the amount of biomass is least at the base of pyramid and the amount of biomass is maximum at the apex of the pyramid. fig.: Inverted biomass pyramid of aquatic ecosystem.
NEET-2021
Ecosystem
260287
Certain characteristic Demographic features of developing countries are -
1 High fertility high density, rapidly rising mortality rate and very young age distribution
2 High infant mortality, low fertility, uneven population growth and a very young age distribution
3 High mortality high density uneven population growth and a very old age distribution
4 High fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution
Explanation:
Developing countries show expanding population Pyramid with maximum age distribution in pre reproductive phase i.e. a very young age distribution high fertility and low mortality rate.
AIPMT-2004
Ecosystem
260288
Which one of the following is not used for construction of ecological pyramids ?
1 Dry weight
2 Number of individuals
3 Rate of energy flow
4 Fresh weight
Explanation:
Common parameters used for constructing ecological pyramids are number of individuals (pyramid of numbers). Dry weight (pyramid of biomass), or rate of energy flow (pyramid of energy) at successive trophic levels. - Ecological pyramids represents the trophic structure and trophic function of an ecosystem. - Fresh weight is not is not used in ecological pyramids
260285
Which of the following statements is incorrect?
1 Energy content gradually decreases from first to fourth trophic level
2 Biomass decreases from first to fourth trophic level
3 Energy content gradually increases from first to fourth trophic level
4 Number of individuals decreases from first trophic level to fourth trophic level
Explanation:
According to the $10 \%$ law. only $10 \%$ of the available energy is passed to next trophic level. Rest is used for metabolic processes or as heat. Hence, energy gradually decrease with each level. Biomass is the total mass of organisms at a trophic level. usually with the increase in trophic level, the number of organisms decrease and hence the biomass at that trophic level.
NEET-2020 Phase-II
Ecosystem
260286
Which of the following statements is not correct?
1 Pyramid of numbers in a grassland ecosystem is upright
2 Pyramid of biomass in sea is generally inverted.
3 Pyramid of biomass in sea is generally upright.
4 Pyramid of energy is always upright
Explanation:
The pyramid of biomass in the sea is inverted because the amount of biomass is least at the base of pyramid and the amount of biomass is maximum at the apex of the pyramid. fig.: Inverted biomass pyramid of aquatic ecosystem.
NEET-2021
Ecosystem
260287
Certain characteristic Demographic features of developing countries are -
1 High fertility high density, rapidly rising mortality rate and very young age distribution
2 High infant mortality, low fertility, uneven population growth and a very young age distribution
3 High mortality high density uneven population growth and a very old age distribution
4 High fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution
Explanation:
Developing countries show expanding population Pyramid with maximum age distribution in pre reproductive phase i.e. a very young age distribution high fertility and low mortality rate.
AIPMT-2004
Ecosystem
260288
Which one of the following is not used for construction of ecological pyramids ?
1 Dry weight
2 Number of individuals
3 Rate of energy flow
4 Fresh weight
Explanation:
Common parameters used for constructing ecological pyramids are number of individuals (pyramid of numbers). Dry weight (pyramid of biomass), or rate of energy flow (pyramid of energy) at successive trophic levels. - Ecological pyramids represents the trophic structure and trophic function of an ecosystem. - Fresh weight is not is not used in ecological pyramids
