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प्रश्न
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.
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उत्तर
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संबंधित प्रश्न
From among the sets of terms given below, identify those that are associated with the gynoecium.
The method of embryo sac forming from a single megaspore is called ______.
Name the component cells of the ‘egg apparatus’ in an embryo sac.
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.
Draw a diagram of the mature embryo sac of an angiospermic ovule and label any four parts in it.
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?
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?
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?
How many nuclei contribute to the formation of the endosperm, and what is the resulting ploidy level of the endosperm?
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?
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?
