Germ pore is pore in the outer layer of the pollen grain which helps in initiation of pollen tube on germination.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341615
After penetrating stigmatic and stylar tissue, the pollen tube usually grows towards eggs because
1 Because no other path to follow
2 The filiform apparatus of synergids believed to attract the pollen
3 It grows under the control of egg nucleus
4 Attracted by dissimilar electric charge
Explanation:
In flowering plants, guidance of the pollen tube to the embryo sac is critical for successful fertilization. The target embryo sac may attract the pollen tube as the final step of guidance in the pistil. A single synergid cell was sufficient to an attraction signal, and two cells enhanced it. After fertilization, the embryo sac no longer attracts the pollen tube, despite the persistence of one synergid cell.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341616
Self-incompatability _
1 Works the same-way in all plants
2 Does not have potentital agricultural applications
3 Maintains variation
4 On the same mechanism of transplant rejection seen in animal
Explanation:
Another device to prevent inbreeding is self-incompatibility. This is a genetic mechanism and prevents self-pollen (from the same flower or other flowers of the same plant) from fertilising the ovules by inhibiting pollen germination or pollen tube growth in the pistil. Thus giving rise to variations.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341617
Function of the filiform apparatus is to
1 Guide the entry of pollen tube
2 Produce nectar
3 Stimulate division of generative cell
4 Recognize suitable pollen at stigma
Explanation:
Usually pollen tube enters the embryo sac by passing into one of the two synergids and is guided by filiform apparatus
Germ pore is pore in the outer layer of the pollen grain which helps in initiation of pollen tube on germination.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341615
After penetrating stigmatic and stylar tissue, the pollen tube usually grows towards eggs because
1 Because no other path to follow
2 The filiform apparatus of synergids believed to attract the pollen
3 It grows under the control of egg nucleus
4 Attracted by dissimilar electric charge
Explanation:
In flowering plants, guidance of the pollen tube to the embryo sac is critical for successful fertilization. The target embryo sac may attract the pollen tube as the final step of guidance in the pistil. A single synergid cell was sufficient to an attraction signal, and two cells enhanced it. After fertilization, the embryo sac no longer attracts the pollen tube, despite the persistence of one synergid cell.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341616
Self-incompatability _
1 Works the same-way in all plants
2 Does not have potentital agricultural applications
3 Maintains variation
4 On the same mechanism of transplant rejection seen in animal
Explanation:
Another device to prevent inbreeding is self-incompatibility. This is a genetic mechanism and prevents self-pollen (from the same flower or other flowers of the same plant) from fertilising the ovules by inhibiting pollen germination or pollen tube growth in the pistil. Thus giving rise to variations.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341617
Function of the filiform apparatus is to
1 Guide the entry of pollen tube
2 Produce nectar
3 Stimulate division of generative cell
4 Recognize suitable pollen at stigma
Explanation:
Usually pollen tube enters the embryo sac by passing into one of the two synergids and is guided by filiform apparatus
Germ pore is pore in the outer layer of the pollen grain which helps in initiation of pollen tube on germination.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341615
After penetrating stigmatic and stylar tissue, the pollen tube usually grows towards eggs because
1 Because no other path to follow
2 The filiform apparatus of synergids believed to attract the pollen
3 It grows under the control of egg nucleus
4 Attracted by dissimilar electric charge
Explanation:
In flowering plants, guidance of the pollen tube to the embryo sac is critical for successful fertilization. The target embryo sac may attract the pollen tube as the final step of guidance in the pistil. A single synergid cell was sufficient to an attraction signal, and two cells enhanced it. After fertilization, the embryo sac no longer attracts the pollen tube, despite the persistence of one synergid cell.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341616
Self-incompatability _
1 Works the same-way in all plants
2 Does not have potentital agricultural applications
3 Maintains variation
4 On the same mechanism of transplant rejection seen in animal
Explanation:
Another device to prevent inbreeding is self-incompatibility. This is a genetic mechanism and prevents self-pollen (from the same flower or other flowers of the same plant) from fertilising the ovules by inhibiting pollen germination or pollen tube growth in the pistil. Thus giving rise to variations.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341617
Function of the filiform apparatus is to
1 Guide the entry of pollen tube
2 Produce nectar
3 Stimulate division of generative cell
4 Recognize suitable pollen at stigma
Explanation:
Usually pollen tube enters the embryo sac by passing into one of the two synergids and is guided by filiform apparatus
Germ pore is pore in the outer layer of the pollen grain which helps in initiation of pollen tube on germination.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341615
After penetrating stigmatic and stylar tissue, the pollen tube usually grows towards eggs because
1 Because no other path to follow
2 The filiform apparatus of synergids believed to attract the pollen
3 It grows under the control of egg nucleus
4 Attracted by dissimilar electric charge
Explanation:
In flowering plants, guidance of the pollen tube to the embryo sac is critical for successful fertilization. The target embryo sac may attract the pollen tube as the final step of guidance in the pistil. A single synergid cell was sufficient to an attraction signal, and two cells enhanced it. After fertilization, the embryo sac no longer attracts the pollen tube, despite the persistence of one synergid cell.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341616
Self-incompatability _
1 Works the same-way in all plants
2 Does not have potentital agricultural applications
3 Maintains variation
4 On the same mechanism of transplant rejection seen in animal
Explanation:
Another device to prevent inbreeding is self-incompatibility. This is a genetic mechanism and prevents self-pollen (from the same flower or other flowers of the same plant) from fertilising the ovules by inhibiting pollen germination or pollen tube growth in the pistil. Thus giving rise to variations.
BIOXII02: SEXUAL REPRODUCTION IN FLOWERING PLANTS
341617
Function of the filiform apparatus is to
1 Guide the entry of pollen tube
2 Produce nectar
3 Stimulate division of generative cell
4 Recognize suitable pollen at stigma
Explanation:
Usually pollen tube enters the embryo sac by passing into one of the two synergids and is guided by filiform apparatus
