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प्रश्न
Name the component cells of the ‘egg apparatus’ in an embryo sac.
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उत्तर
Two synergids and an egg.
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संबंधित प्रश्न
From among the sets of terms given below, identify those that are associated with the gynoecium.
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
The embryo sac is ______
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.
With a neat, labelled diagram, describe the parts of a mature angiosperm embryo sac. Mention the role of synergids.
Embryo sacs of some apomictic species appear normal but contain diploid cells. Suggest a suitable explanation for the condition.
Trace the development of a megaspore mother cell to the formation of a mature embryo sac in a flowering plant.
Explain the monosporic development of the embryo sac in the ovule of an angiosperm.
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?
In the first mitotic division of the functional megaspore, the two daughter nuclei move to opposite poles of the enlarging megaspore. What stage is this called?
Following the 2-nucleate stage, both nuclei divide simultaneously during the second mitotic division. What is the resulting stage called, and how many nuclei are at each pole?
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?
How many nuclei contribute to the formation of the endosperm, and what is the resulting ploidy level of the endosperm?
Considering the cell distribution in a mature embryo sac, how many haploid cells are present in total?
During the development of the embryo sac, which stage immediately precedes the formation of the polar nuclei by migration?
How many mitotic divisions are required to convert the haploid functional megaspore into the 8-nucleate stage?
In the mature embryo sac, which structure contains the filiform apparatus that aids in guiding the pollen tube?
