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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.
Q. What is the structure of the adult fern within which cells undergoing meiosis can be found? In these plants meiosis takes place within structures known as sorus (plural, sor
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Explain in detail about Male Reproductive System The male reproductive organ consists of the following: A pair of testes, held in scortum; produces spermatooa and testoster
Question 1 Write a short note on the following Impactors Land fills Bio stimulation Green house effects Question 2 What is bioremediation? Give an account o
Define Standardization - Nutritional Biochemistry? One of the substances involved in a titration must be used as a standard for which the amount of substance present is accura
what are sphaerosomes?
A cellular system has a total of 500 duplex voice channels. The service area is divided into 150 cells. Suggest a three different cluster size (N) values. In each case, determine
Genital warts and human papillomavirus (hpv) infection External genital warts are caused by human papillo- mavirus, usually type 6 or 11; other types (16, 18 and others) cause
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Devonian is the period of geologic time from 410 - 360 million years before the present. Life on land diversified, with amphibians appearing late in this period of time. Plants we
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