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प्रश्न
From among the sets of terms given below, identify those that are associated with the gynoecium.
विकल्प
Stigma, ovule, embryo sac, placenta
Thalamus, pistil, style, ovule
Ovule, ovary, embryo sac, tapetum
Ovule, stamen, ovary, embryo sac
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उत्तर
Stigma, ovule, embryo sac, placenta
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संबंधित प्रश्न
From the statements given below choose the option that are true for a typical female gametophyte of a flowering plant.
- It is 8-nucleate and 7-celled at maturity
- It is free-nuclear during the development
- It is situated inside the integument but outside the nucellus
- It has an egg apparatus situated at the chalazal end
In an embryo sac, the cells that degenerate after fertilisation are ______.
In a flower, if the megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, its nuclei would be ______.
Draw the diagram of a mature embryo sac and show its 8-nucleate, 7-celled nature. Show the following parts: antipodals, synergids, egg, central cell, polar nuclei.
Embryo sacs of some apomictic species appear normal but contain diploid cells. Suggest a suitable explanation for the condition.
Explain the monosporic development of the embryo sac in the ovule of an angiosperm.
Draw a diagram of the mature embryo sac of an angiospermic ovule and label any four parts in it.
The female gametophyte of angiosperms is called the embryo sac. How many cells and nuclei does a mature embryo sac contain?
During the development of the female gametophyte, the functional megaspore undergoes mitotic divisions without immediate cell wall formation. What are these divisions called?
Which cells or cell group at the micropylar end of the mature embryo sac constitute the egg apparatus?
Which cells are located at the chalazal end of the mature embryo sac, and how many of them are present?
Based on the cell distribution table, which cell or group of cells contributes a haploid gamete nucleus during double fertilization?
What is the total number of haploid nuclei present in the 8-nucleate stage of the developing female gametophyte before cell walls are formed?
During the development of the embryo sac, which stage immediately precedes the formation of the polar nuclei by migration?
In the mature embryo sac, which structure contains the filiform apparatus that aids in guiding the pollen tube?
