263003
Sparrow eating a seed is : [NCERT - NC-II-209]
1 Primary consumer
2 Secondary consumer
3 Tertiary consumer
4 Top consumer
Explanation:
a 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.
Ecosystem
263008
The total amount of organic matter that plants produce by photosynthesis is called [NCERT - NC-II-207]
1 Gross primary productivity
2 Net primary productivity
3 Biomass
4 Eutrophication
Explanation:
a Gross primary productivity of an ecosystem is the rate of production of organic matter during photosynthesis.
Ecosystem
263009
Herbivores are [NCERT - NC-II-209]
1 Primary consumers only
2 T3 only
3 T2 only
4 Primary consumers or T2 or consumers of 1st order
Explanation:
d Producers belong to the first trophic level, herbivores (primary consumer) to the second and carnivores (secondary consumer) to the third.
Ecosystem
263016
Polyembryony is found in [NCERT - NC-II-23]
1 Citrus
2 Mango
3 Ricinus
4 1 and 2
Explanation:
d More often, as in many Citrus and Mango varieties some of the nucellar cells surrounding the embryo sac start dividing, protrude into the embryo sac and develop into the embryos. In such species each ovule contains many embryos. Occurrence of more than one embryo in a seed is referred as polyembryony.
Ecosystem
263018
The formation of embryo sac from a single megaspore is : [NCERT - NC-II-10]
1 Bisporic development
2 Monosporic development
3 Tetrasporic development
4 All of the above
Explanation:
b In a majority of flowering plants, one of the megaspores is functional while the other three degenerate. Only the functional megaspore develops into the female gametophyte (embryo sac). This method of embryo sac formation from a single megaspore is termed monosporic development.
263003
Sparrow eating a seed is : [NCERT - NC-II-209]
1 Primary consumer
2 Secondary consumer
3 Tertiary consumer
4 Top consumer
Explanation:
a 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.
Ecosystem
263008
The total amount of organic matter that plants produce by photosynthesis is called [NCERT - NC-II-207]
1 Gross primary productivity
2 Net primary productivity
3 Biomass
4 Eutrophication
Explanation:
a Gross primary productivity of an ecosystem is the rate of production of organic matter during photosynthesis.
Ecosystem
263009
Herbivores are [NCERT - NC-II-209]
1 Primary consumers only
2 T3 only
3 T2 only
4 Primary consumers or T2 or consumers of 1st order
Explanation:
d Producers belong to the first trophic level, herbivores (primary consumer) to the second and carnivores (secondary consumer) to the third.
Ecosystem
263016
Polyembryony is found in [NCERT - NC-II-23]
1 Citrus
2 Mango
3 Ricinus
4 1 and 2
Explanation:
d More often, as in many Citrus and Mango varieties some of the nucellar cells surrounding the embryo sac start dividing, protrude into the embryo sac and develop into the embryos. In such species each ovule contains many embryos. Occurrence of more than one embryo in a seed is referred as polyembryony.
Ecosystem
263018
The formation of embryo sac from a single megaspore is : [NCERT - NC-II-10]
1 Bisporic development
2 Monosporic development
3 Tetrasporic development
4 All of the above
Explanation:
b In a majority of flowering plants, one of the megaspores is functional while the other three degenerate. Only the functional megaspore develops into the female gametophyte (embryo sac). This method of embryo sac formation from a single megaspore is termed monosporic development.
263003
Sparrow eating a seed is : [NCERT - NC-II-209]
1 Primary consumer
2 Secondary consumer
3 Tertiary consumer
4 Top consumer
Explanation:
a 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.
Ecosystem
263008
The total amount of organic matter that plants produce by photosynthesis is called [NCERT - NC-II-207]
1 Gross primary productivity
2 Net primary productivity
3 Biomass
4 Eutrophication
Explanation:
a Gross primary productivity of an ecosystem is the rate of production of organic matter during photosynthesis.
Ecosystem
263009
Herbivores are [NCERT - NC-II-209]
1 Primary consumers only
2 T3 only
3 T2 only
4 Primary consumers or T2 or consumers of 1st order
Explanation:
d Producers belong to the first trophic level, herbivores (primary consumer) to the second and carnivores (secondary consumer) to the third.
Ecosystem
263016
Polyembryony is found in [NCERT - NC-II-23]
1 Citrus
2 Mango
3 Ricinus
4 1 and 2
Explanation:
d More often, as in many Citrus and Mango varieties some of the nucellar cells surrounding the embryo sac start dividing, protrude into the embryo sac and develop into the embryos. In such species each ovule contains many embryos. Occurrence of more than one embryo in a seed is referred as polyembryony.
Ecosystem
263018
The formation of embryo sac from a single megaspore is : [NCERT - NC-II-10]
1 Bisporic development
2 Monosporic development
3 Tetrasporic development
4 All of the above
Explanation:
b In a majority of flowering plants, one of the megaspores is functional while the other three degenerate. Only the functional megaspore develops into the female gametophyte (embryo sac). This method of embryo sac formation from a single megaspore is termed monosporic development.
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Ecosystem
263003
Sparrow eating a seed is : [NCERT - NC-II-209]
1 Primary consumer
2 Secondary consumer
3 Tertiary consumer
4 Top consumer
Explanation:
a 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.
Ecosystem
263008
The total amount of organic matter that plants produce by photosynthesis is called [NCERT - NC-II-207]
1 Gross primary productivity
2 Net primary productivity
3 Biomass
4 Eutrophication
Explanation:
a Gross primary productivity of an ecosystem is the rate of production of organic matter during photosynthesis.
Ecosystem
263009
Herbivores are [NCERT - NC-II-209]
1 Primary consumers only
2 T3 only
3 T2 only
4 Primary consumers or T2 or consumers of 1st order
Explanation:
d Producers belong to the first trophic level, herbivores (primary consumer) to the second and carnivores (secondary consumer) to the third.
Ecosystem
263016
Polyembryony is found in [NCERT - NC-II-23]
1 Citrus
2 Mango
3 Ricinus
4 1 and 2
Explanation:
d More often, as in many Citrus and Mango varieties some of the nucellar cells surrounding the embryo sac start dividing, protrude into the embryo sac and develop into the embryos. In such species each ovule contains many embryos. Occurrence of more than one embryo in a seed is referred as polyembryony.
Ecosystem
263018
The formation of embryo sac from a single megaspore is : [NCERT - NC-II-10]
1 Bisporic development
2 Monosporic development
3 Tetrasporic development
4 All of the above
Explanation:
b In a majority of flowering plants, one of the megaspores is functional while the other three degenerate. Only the functional megaspore develops into the female gametophyte (embryo sac). This method of embryo sac formation from a single megaspore is termed monosporic development.
263003
Sparrow eating a seed is : [NCERT - NC-II-209]
1 Primary consumer
2 Secondary consumer
3 Tertiary consumer
4 Top consumer
Explanation:
a 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.
Ecosystem
263008
The total amount of organic matter that plants produce by photosynthesis is called [NCERT - NC-II-207]
1 Gross primary productivity
2 Net primary productivity
3 Biomass
4 Eutrophication
Explanation:
a Gross primary productivity of an ecosystem is the rate of production of organic matter during photosynthesis.
Ecosystem
263009
Herbivores are [NCERT - NC-II-209]
1 Primary consumers only
2 T3 only
3 T2 only
4 Primary consumers or T2 or consumers of 1st order
Explanation:
d Producers belong to the first trophic level, herbivores (primary consumer) to the second and carnivores (secondary consumer) to the third.
Ecosystem
263016
Polyembryony is found in [NCERT - NC-II-23]
1 Citrus
2 Mango
3 Ricinus
4 1 and 2
Explanation:
d More often, as in many Citrus and Mango varieties some of the nucellar cells surrounding the embryo sac start dividing, protrude into the embryo sac and develop into the embryos. In such species each ovule contains many embryos. Occurrence of more than one embryo in a seed is referred as polyembryony.
Ecosystem
263018
The formation of embryo sac from a single megaspore is : [NCERT - NC-II-10]
1 Bisporic development
2 Monosporic development
3 Tetrasporic development
4 All of the above
Explanation:
b In a majority of flowering plants, one of the megaspores is functional while the other three degenerate. Only the functional megaspore develops into the female gametophyte (embryo sac). This method of embryo sac formation from a single megaspore is termed monosporic development.