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प्रश्न
A capsicum flower has 240 ovules in its ovary. But, it produces a fruit with only 180 viable seeds.
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उत्तर
Ovules develop into viable seeds which are capable of germination under suitable environmental conditions. Viability is influenced by various conditions like humidity, temperature, and availability of oxygen. Viability can be lost due to:
(2) damage to the embryo
(3) denaturation of enzymes
(4) extremely high temperatures
(5) excessively dry weather
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संबंधित प्रश्न
List the three stages the annuals and biennial angiosperms have to pass through during their life cycle.
In a flowering plant a microspore mother cell produces four male gametophytes, while a megaspore mother cell forms only one female gametophyte. Explain.
Give an example of an angiosperm seed that has a perisperm. Name the part the perisperm develops from.
Give a reason for the Following:
Pollen grains of wind-pollinated flowers are produced in large quantities.
Explain the events upto double fertilisation after the pollen tube enters one of the synergids in an ovule of an angiosperm.
Fragrant flowers with well developed nectaries are an adaptation for ______.
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.
In angiosperms, the site of sexual reproduction is ______.
Male and female reproductive structures of the angiosperms are ______.
