Pollen grain is liberated at 2 or 3 celled stage. If pollen grain is released at the 2-celled stage (i.e., vegetative and generative cells) then generative cell divides meiotically to produce two male gametes, but when pollen grains are released at 3-celled stage then two male gametes are already present.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341912
The number of pollen mother cells, and megaspore mother cells required for the formation of 403 male and female gametes respectively
1 51 & 403
2 101 & 59
3 50 & 403
4 101 & 101
Explanation:
Each pollen mother cell produce 4 pollen grain by meiosis, ecah pollen grain produce 2 male gamete by 2 mitotic division thus for the formation of 403 male gametes 51 pollen mother cell required.Each megaspore mother cell produced only one egg (female gamete) thus for the formation of 403 female gametes 403 MMC required.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341913
The ovule of an angiosperm is technically equivalent to :
1 Megaspore mother cell
2 Megaspore
3 Megasporangium
4 Megasporophyll
Explanation:
The ovule of an angiosperm is technically equivalent to: Megasporangium
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341914
In majority of the cases, number of megaspores get degenerated is
1 1
2 2
3 3
4 4
Explanation:
In majority of flowering plants, one of the megaspores is functional while the other 3 get degenerated.
Pollen grain is liberated at 2 or 3 celled stage. If pollen grain is released at the 2-celled stage (i.e., vegetative and generative cells) then generative cell divides meiotically to produce two male gametes, but when pollen grains are released at 3-celled stage then two male gametes are already present.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341912
The number of pollen mother cells, and megaspore mother cells required for the formation of 403 male and female gametes respectively
1 51 & 403
2 101 & 59
3 50 & 403
4 101 & 101
Explanation:
Each pollen mother cell produce 4 pollen grain by meiosis, ecah pollen grain produce 2 male gamete by 2 mitotic division thus for the formation of 403 male gametes 51 pollen mother cell required.Each megaspore mother cell produced only one egg (female gamete) thus for the formation of 403 female gametes 403 MMC required.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341913
The ovule of an angiosperm is technically equivalent to :
1 Megaspore mother cell
2 Megaspore
3 Megasporangium
4 Megasporophyll
Explanation:
The ovule of an angiosperm is technically equivalent to: Megasporangium
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341914
In majority of the cases, number of megaspores get degenerated is
1 1
2 2
3 3
4 4
Explanation:
In majority of flowering plants, one of the megaspores is functional while the other 3 get degenerated.
Pollen grain is liberated at 2 or 3 celled stage. If pollen grain is released at the 2-celled stage (i.e., vegetative and generative cells) then generative cell divides meiotically to produce two male gametes, but when pollen grains are released at 3-celled stage then two male gametes are already present.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341912
The number of pollen mother cells, and megaspore mother cells required for the formation of 403 male and female gametes respectively
1 51 & 403
2 101 & 59
3 50 & 403
4 101 & 101
Explanation:
Each pollen mother cell produce 4 pollen grain by meiosis, ecah pollen grain produce 2 male gamete by 2 mitotic division thus for the formation of 403 male gametes 51 pollen mother cell required.Each megaspore mother cell produced only one egg (female gamete) thus for the formation of 403 female gametes 403 MMC required.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341913
The ovule of an angiosperm is technically equivalent to :
1 Megaspore mother cell
2 Megaspore
3 Megasporangium
4 Megasporophyll
Explanation:
The ovule of an angiosperm is technically equivalent to: Megasporangium
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341914
In majority of the cases, number of megaspores get degenerated is
1 1
2 2
3 3
4 4
Explanation:
In majority of flowering plants, one of the megaspores is functional while the other 3 get degenerated.
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BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341935
Pollen grain is liberated at
1 One celled stage.
2 Two celled stage.
3 Three celled stage.
4 Two or three celled stage.
Explanation:
Pollen grain is liberated at 2 or 3 celled stage. If pollen grain is released at the 2-celled stage (i.e., vegetative and generative cells) then generative cell divides meiotically to produce two male gametes, but when pollen grains are released at 3-celled stage then two male gametes are already present.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341912
The number of pollen mother cells, and megaspore mother cells required for the formation of 403 male and female gametes respectively
1 51 & 403
2 101 & 59
3 50 & 403
4 101 & 101
Explanation:
Each pollen mother cell produce 4 pollen grain by meiosis, ecah pollen grain produce 2 male gamete by 2 mitotic division thus for the formation of 403 male gametes 51 pollen mother cell required.Each megaspore mother cell produced only one egg (female gamete) thus for the formation of 403 female gametes 403 MMC required.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341913
The ovule of an angiosperm is technically equivalent to :
1 Megaspore mother cell
2 Megaspore
3 Megasporangium
4 Megasporophyll
Explanation:
The ovule of an angiosperm is technically equivalent to: Megasporangium
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341914
In majority of the cases, number of megaspores get degenerated is
1 1
2 2
3 3
4 4
Explanation:
In majority of flowering plants, one of the megaspores is functional while the other 3 get degenerated.
