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प्रश्न
In a flowering plant a microspore mother cell produces four male gametophytes, while a megaspore mother cell forms only one female gametophyte. Explain.
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उत्तर
Cyanobacteria are free living or symbiotic blue-green algae which are capable of converting atmospheric molecular nitrogen into soluble forms like nitrites or nitrates. They enrich the nitrogen content of the soil, thus, acting as a natural fertilizer. They replenish the soil with the nitrogenous compounds and hence are useful in agriculture.
संबंधित प्रश्न
Sketch and label stages in the development of the angiospermic female gametophyte from the functional megaspore.
Give an example of an angiosperm seed that has a perisperm. Name the part the perisperm develops from.
Name a plant which flowers every twelve years.
Name the terminal stage of ageing in the life cycle of plants.
Sketch and label ‘structure of a pea flower’.
Explain the different types of endosperms in angiosperms.
Science of cultivation, breeding, marketing and arrangement of flowers is called ______.
Fragrant flowers with well developed nectaries are an adaptation for ______.
In a fertilized ovule, n, 2n, and 3n conditions occur respectively in ______
Verticillaster inflorescence is a characteristic feature of ______.
Angiosperms have dominated the land flora primarily because of their ______.
Place the following groups of plants in order, beginning with those that first appeared on the earth and progressing toward those that appeared most recently in time.
What is the similarity between gymnosperms and angiosperms?
The flower is a highly modified and condensed reproductive shoot specially meant for ______
