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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.
List the three stages the annuals and biennial angiosperms have to pass through during their life cycle.
Explain the events upto double fertilisation after the pollen tube enters one of the synergids in an ovule of an angiosperm.
A typical flower has ______ different kinds of whorl.
Pollen grains are well preserved as fossils because of the presence of ______
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.
Which of the following statement is incorrect?
The flower is a highly modified and condensed reproductive shoot specially meant for ______
In angiosperms, the site of sexual reproduction is ______.
Male and female reproductive structures of the angiosperms are ______.
Axile placentation is observed in ______.
Which part of the flower is responsible for protecting the inner floral parts during the bud stage?
Which of the following is considered an "essential whorl" of a flower?
What is the main function of the corolla?
