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Self-Pollination - Types of Pollination
Self-pollination refers to the transfer of pollen grains from the anther to the stigma of the same flower. In chasmogamous flowers the mature anthers and stigma are exposed to pollinating agents. In cleistogamous flowers fertilization is accomplished without exposing the sex organs (cleistogamy) to the atmosphere. Commelina benghalensis produces both chasmogamous (aerial) and cleistogamous (underground) flowers. Conversion of chasmogamous flowers to cleistogamous type depends on environment conditions, like temperature.
a) What is the special property of a 'persistent' insecticide? b) In what ways is 'persistence' (i) a useful property, (ii) a harmful property? (a) A persisten
Explain Poor growth - clinical signs of kwashiorkor? Growth retardation is the earliest manifestation of kwashiorkor, the child will be lighter and shorter than its normal peer
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What is xaxim? Most pteridophytes have subterraneous stems similar to the substrate called as rhizomes. Xaxim is a kind of pteridophyte with an aerial stem in generally perpend
Kevin and his wife have been trying to have a baby for the past three years. On seeking the help of a fertility specialist, Kevin learned that he has a hereditary form of male ster
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Structure and development of leaf
Mitochondria, which fuel life's processes in all cells, uses nutrients from digested food and oxygen which has diffused across cell surface. In freshwater protozoans water expulsio
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