Tag: post fertilization - plants
Questions Related to post fertilization - plants
Mature ovary forms the
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Seed
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Stamen
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Pistil
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Fruit
Fruits are formed by the maturation of one or more ovary. Fruits contain seeds resulting from the maturation of fertilized ovules. However, maturation of seed and fruit can occur in the absence of fertilization. In fleshy fruits, the outer covering is called as pericarp. Pericarp is again made of three layers, the epicarp, which is the outermost layer; the mesocarp, which is the middle layer; and the endocarp, which is the inner layer surrounding the ovary or the seeds.
Which of the following is a post fertilisation event in flowering plants?
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Transfer of pollen grains
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Embryo development
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Formation of flower
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Formation of pollen grains
In angiosperms, normally after fertilisation.
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The zygote divides earlier than the primary endosperm nucleus
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The primary endosperm nucleus divides earlier than the zygote
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Both the zygote and primary endosperm nuclei divide simultaneously
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Both the zygote and primary endosperm nuclei undergo a resting period
Endosperm is the nutritive tissue for the developing embryo and the seedlings. In angiosperm, the endosperm develops from triploid primary endosperm nucleus which is formed as a result of vegetative fertilization, triple fusion or fusion of male gamete with the secondary nucleus of the central cell. Generally, endosperm divides before zygote because it will provide nourishment to the developing zygote.
In angiosperms, triple fusion is required for formation of
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Embryo
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Endosperm
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Suspensor
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Fruit wall
The wheat grain is a
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Fruit
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Seed
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Embryo
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Glume
Wheat is a grain, which belongs to the grass family Poaceae or Gramineae. Wheat grain is a fruit (Caryopsis) that produces a dry edible seed which is commonly known as the kernel. Wheat grain is a small edible fruit, usually hard on the outside. Corn, grain sorghum, rice, oats, and rye are other examples of grains.
'Sonalika' is a variety of
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Rice
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Wheat
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Maize
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Bajra
Sonalika is developed from high yielding , semi dwarf , fertilizer responsive wheat variety .Sonalika is not an Indian wheat variety.
To form 100 angiosperm seeds, how many mitosis are required?
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300
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200
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500
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Can't say
For the formation of male gametophyte, 1 meiosis and 2 mitoses are required.
After fertilization ______ develops into seed and ovary into fruit.
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endosperm
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ovary
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embryo sac
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egg cell
After fertilization ________ develops into seed and ______ into fruit.
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Endosperm
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Ovary
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Embryo sac
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Egg cell
Identify the wrong statements regarding post fertilization development.
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The ovary wall develops into pericarp.
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The outer integument of the ovule develops into tegmen.
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The fusion nucleus (triple nucleus) develops into endosperm.
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The ovule develops into seed.
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The ovary develops into fruit.
After fertilization, the ovule matures into seeds and ovary into fruits. The process of fertilization is unique in angiosperms because it involves syngamy between male and female gametes and triple fusion between a male gamete and a secondary nucleus. Because two fertilization events are involved, it is called as double fertilization. The second fertilization is a fusion between three haploid nucleus (two forming a diploid secondary nucleus and one haploid male nucleus). Hence the secondary fertilization event is called as Triple fusion. It gives rise to a triploid primary endosperm nucleus (PEN). PEN later on gives rise to triploid endosperm. The seed coat forms from the two integuments or outer layers of cells of the ovule, which derive from tissue from the mother plant, the inner integument forms the tegmen and the outer forms the testa. The seed coats of some monocotyledon plants, such as the grasses, are not distinct structures, but are fused with the fruit wall to form a pericarp.