What Is The Process?|Out Breeding Devices|Dicliny|Herkogamy|Heterostyly|Self Incomatibility |Pollen Pistil Interaction|Artificial Hybridisation|Double Fertilisation

Advantages And Disadvantages|Self Pollination|Cross Pollination|Out Breeding Devices|Dicliny|Herkogamy|Herkostyly|Self Incompatibilty|Artificial Hybridisation|OMR

Process|Pollination|Wind Pollination|Insect Pollination|Artificial Hybridisation|Pollen Pistil Interaction |Apomixes

Reproduction In Plants - Site For Reproduction|Male Reproductive Part|Female Reproductive Part|Reproduction Process|Gametogenesis|Gamete Transfer - Pollination|Pollen Pistil Interaction|Fertilisation|Post Fertilisation Changes|Seed Germination

Angiosperms|Microsporophyll - Stamen|Microsporogenesis |Male Gametophyte - Pollen Grain|Megasporophyll - Pistil / Carpel|Megasporangia|Female Gametophyte - Embryo Sac|Pollination And Pollen Pistil Interaction|Double Fertilisation|Life Cycle|Post Fertilisation Changes|Classification Of Angiosperms|Monocots And Dicots|Economic Importance

Microsporogenesis|Male Gametophyte - Pollen Grain|Megasporogenesis|Female Gametophyte - Embryo sac|Pollination And Pollen Pistil Interaction|Double Fertilisation

Which of the following is an outbreeding device ? a. If pollen release and stigma receptivity are not synchronised. b. If the anther and stigma are placed at different positions so that pollen cannot come in contact with the stigma of the same flower. c. Self-incompatibilty which prevents self-pollen (from the same plant) from fertilising the ovules by inhibiting pollen germination or pollen tube growth in the pistil. d. Production of the unisexual flower

Given below are five statements (i-v) regarding constrivances to ensure cross - pollination is plants (i) Dicliny - Anthers stigmas mature at different times in a bisexual flower. (ii) Dichogamy - Flowers are unisexual. (iii) Prepotency - Pollen grains of the same flower germinate more rapidly over the stigma than the pollen grains another flower. (iv) Heterostyly - Two or three types of flowers with different heights of styles. (v) Herkogamy - A mechanical device to prevent self - pollination which of the above statement are correct ?