Description : Proximal end of the filament of stamen is attached to the (a) placenta (b) thalamus or petal (c) anther (d) connective
Last Answer : b) thalamus or petal
Description : The part of the flower that is adapted to catch pollen is the: a) stigma b) style c) anther d) ovule
Last Answer : ANSWER: A -- STIGMA
Description : Which of the following statements is not correct? (a) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil. (b) ... Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers.
Last Answer : (c) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.
Description : Difference between stamen and pistil. -Biology
Last Answer : answer:
Description : The floral part that produces pollen grains is (1) Sepal (2) Petal (3) Anther (4) Ovary
Last Answer : (3) Anther Explanation: The anther contains microsporangia. Each microsporangium contains pollen mother cells. These undergo meiosis, and produce pollen grains, which contain the male gametes (sperm). The pollen is released by the opening of the anther.
Description : The floral part that produces pollen grains is - (1 ) Sepal (2) Petal (3) Anther (4) Ovary
Last Answer : (3) Anther Explanation: Anther is the apical portion of a stamen, which produces the microspores or pollen grains. An anther normally comprises four pollen sacs arranged in two groups or lobes joined by the connective tissue to the filament
Description : What part of the flower contains the pollen? a) Anther b) Stigma c) Leaves d) Stem
Last Answer : a) Anther
Last Answer : Anther
Description : Significance of pollen pistil interaction? -Biology
Description : why sterile tissues degenerate in anther during the maturation of pollen grain -Biology
Description : When pollen is transferred from the anther to the stigma? -Biology
Description : Anther or pollen culture technique is used to obtained
Last Answer : Ans. Haploid plants
Description : Consider the following statements about pollination. 1. Transfer of pollen grains from the anther to ovules in the same flower or a different f lower is called pollination. 2. The pollination by wind is called anemophily. 3. Pollination is a ... 1 and 3 (b) 1, 2 and 4 (c) Only 2 (d) 1, 2, 3 and 4
Last Answer : Ans:(c)
Description : Which ones produce androgenic haploids in anther cultures? (a) Anther wall (b) Tapetal layer of anther wall (c) Connective tissue (d) Young pollen grains
Last Answer : (d) Young pollen grains
Description : Male gametophyte of angiosperms is shed at (a) four celled pollen grain (b) three celled pollen grain (c) microspore mother cell (d) anther.
Last Answer : b) three celled pollen grain
Description : Anthesis is a phenomenon which refers to (a) reception of pollen by stigma (b) formation of pollen (c) development of anther (d) opening of flower bud.
Last Answer : (d) opening of flower bud.
Description : Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called (a) xenogamy (b) geitonogamy (c) karyogamy (d) autogamy.
Last Answer : (b) geitonogamy
Description : Which one of the following statements is not true? (a) Pollen grains of many species cause severe allergies. (b) Stored pollen in liquid nitrogen can be used in the crop breeding programmes. (c) Tapetum helps in the dehiscence of anther. (d) Exine of pollen grains is made up of sporopollenin.
Last Answer : (c) Tapetum helps in the dehiscence of anther.
Description : The plant parts which consist of two generations- one within the other (1) pollen grains inside the anther (2) germinated pollen grain with two male gametes (3) seed inside the fruit (4) embryo sac inside the ovule (a) (1) only (b) (1), (2), and (3) (c) (3) and (4)
Last Answer : (d) (1) and (4).
Description : The transfer of pollen grains from anther to stigma is called; a) Fertilization b) pollination c) Microsporogenesis d) Polyembryony
Last Answer : Ans. b) Pollination
Description : Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called:a) Autogamyb) Xenogamyc) Geitonogamyd) Karyogamy
Last Answer : c) Geitonogamy
Description : Parienth is the fnion of a. Calyx and Corolla b. Pedicel and Thalamus c. Stamen and Stigma d. Style and Ovary
Last Answer : Calyx and Corolla
Description : The floral part that receives pollen grains during pollination is - (1 ovary (2) style (3) stigma (4) ovules
Last Answer : (3) stigma Explanation: The stigma is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower. The stigma receives pollen at pollination and it is on the stigma that the pollen grain germinates. The style connects the stigma to the ovary.
Description : The floral part that receives pollen-grains during pollination is (1) ovary (2) style (3) stigma (4) ovules
Last Answer : stigma
Description : Cloud droplets unite most easily to form raindrops in clouds containing which of the following substances? w) ozone x) plant pollen y) carbon tetrachloride z) large salt crystals
Last Answer : ANSWER: Z -- LARGE SALT CRYSTALS
Description : Failure of a viable pollen to grow down the style of the flower of the same variety is called ___________: a. Self sterility b. Self incompatibility c. Self unfruitfulness d. Sterility
Last Answer : Self incompatibility
Description : .In a type of apomixis known as adventive embryony, embryos develop directly from the (a) nucellus or integuments (b) zygote (c) synergids or antipodals in an embryo sac (d) accessory embryo sacs in the ovule
Last Answer : (a) nucellus or integuments
Description : Pollen from a flower of one plant falls on the stigmas of other flowers of the same plant.
Last Answer : Ans. Geitonogamy
Description : When pollen grains from flower of one plant transferred to receptive stigmas of flowers of another plant
Last Answer : Ans. Cross pollination/Allogamy
Description : When pollen grains from an another falls on receptive stigma of the same flowers
Last Answer : Ans. Self pollination
Description : The pollen grains of flowers pollinated by insects are : (1) smooth and dry (2) rough and sticky (3) rough and dry (4) large and, showy
Last Answer : (2) rough and sticky Explanation: Pollen grains are large sticky and heavy, usually with rough surfaces so that they can readily cling onto the insects bodies. They are sticky so that pollen grains settling on them are not easily displaced.
Description : Wind pollinated flowers are (a) small, brightly coloured, producing large number of pollen grains (b) small, producing large number of dry pollen grains (c) large producing abundant nectar and pollen (d) small, producing nectar and dry pollen
Last Answer : (b) small, producing large number of dry pollen grains
Description : Which one of the following statements is correct? (a) Cleistogamous flowers are always autogamous. (b) Xenogamy occurs only by wind pollination. (c) Chasmogamous flowers do not open at all. (d) Geitonogamy involves the pollen and stigma of flowers of different plants.
Last Answer : (a) Cleistogamous flowers are always autogamous.
Description : Which one of the following statements is not true? (a) The flowers pollinated by flies and bats secrete foul odour to attract them. (b) Honey is made by bees by digesting pollen collected ... . (d) Pollen grains of some plants cause severe allergies and bronchial afflictions in some people.
Last Answer : (b) Honey is made by bees by digesting pollen collected from flowers.
Description : What type of pollination takes place in Vallisneria? (a) Pollination occurs in submerged condition by water. (b) Flowers emerge above surface of water, and pollination occurs by insects. (c) Flowers ... wind. (d) Male flowers are carried by water currents to female flowers at surface of water.
Last Answer : (d) Male flowers are carried by water currents to female flowers at surface of water
Description : Parthenocarpic tomato fruits can be producedby (a) treating the plants with phenylmercuric acetate (b) removing androecium of flowers before pollen grains are released (c) treating the plants with low concentrations of gibberellic acid and auxins (d) raising the plants from vernalized seeds
Last Answer : (c) treating the plants with low concentrations of gibberellic acid and auxins
Description : 10. “Cleistogamous flowers are invariably autogamous because” (a) These flowers do not open at all. (b) There is no chance of cross – pollen landing on the stigma. (c) These flowers have exposed anthers and stigma. (d) These flowers are wind pollinated.
Last Answer : (a) These flowers do not open at all.
Description : The pollen grains of flowers pollinated by insects are : (1) smooth and dry (2) rough and sticky (3) rough and dry (4) large and showy
Last Answer : rough and sticky
Description : Name the parts of pistil which develop into fruit and seeds. -Biology
Last Answer : A pistil has three parts , i.e., stigma (receives pollen), which grows down through style to ovary. Ovary contains ovules, which contain an egg. The ovary develops into the fruit and ovule develops into a seeds.
Description : What does the pistil of a flower do? -Biology
Description : What is the pistil of a flower? -Biology
Description : Parts of the pistil of a flower -Biology
Description : what are the functions of pistil and stamon in flowering plants?
Last Answer : school is boring and $h#++y
Description : How does the sticky tip of the pistil help a plant reproduce?
Last Answer : Need answer