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प्रश्न
In an embryo sac, the cells that degenerate after fertilisation are ______.
पर्याय
Synergids and primary endosperm cell
Synergids and antipodals
Antipodals and primary endosperm cell
Egg and antipodals
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उत्तर
In an embryo sac, the cells that degenerate after fertilisation are synergids and antipodals.
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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 ______
The method of embryo sac forming from a single megaspore is called ______.
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 ______.
Name the component cells of the ‘egg apparatus’ in an embryo sac.
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.
The female gametophyte of angiosperms is called the embryo sac. How many cells and nuclei does a mature embryo sac contain?
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 are located at the chalazal end of the mature embryo sac, and how many of them are present?
The central cell of the mature embryo sac contains two polar nuclei. What is the ploidy level of the central cell after the two polar nuclei fuse?
The mature embryo sac is described as monosporic and of the Polygonum type. What does the term monosporic indicate about the origin of the embryo sac?
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?
