1.write post fertilisation development in plant?
2.How is placenta useful in the reproduction process?
3. write the structure of S8?
4. How is saturated Hydro carbon different from
unsaturated one?
5. write the general formula of Alkene and Alkyne?
6.How did wholer produce urea?
Answers
Answer:
1. In plants, fertilization is defined as the fusion of the male and the female gamete to develop into a diploid zygote. After fertilization, a series of event occurs in the zygote to develop into a seed. Let us take an overview of the process of post-fertilization, endosperm and embryo formation.
2. The transfer of nutrients and oxygen from the mother to the fetus, and waste products and carbon dioxide back from the fetus to the mother, allows the growth and development of the fetus throughout pregnancy. ... The placenta also acts as an endocrine organ, producing several important hormones during pregnancy.
3. The atomic number (Z) of sulphur is sixteen and its electronic configuration is 2, 8, 6. The chemical formula of sulphur molecule is S8. ... Each sulphur atom is linked to similar atoms on either side by single covalent bonds and thus, completes its octet.
4. A saturated hydrocarbon is the hydrocarbon in which all its carbon-carbon bonds are single. ... An unsaturated hydrocarbon,however, is the one in which some carbon-carbon bonds can be double or triple. e.g alkenes like ethene have double bonds while alkynes like ethyne have triple bonds
5. Alkenes and alkynes are called as unsaturated hydrocarbons. Alkanes have the general formula of CnH2n+2 where n is the number of carbon atoms. Alkenes have the general formula CnH2n. The general formula for alkynes is CnH2n-2.
6. In this experiment, Wohler was attempting to make ammonia cyanate, but when the ammonia cyanate formed in these conditions it decomposed and then formed urea. ... Salt rearrangement, forming ammonium cyanate. Ammonium decomposes forming ammonia and cyanic acid. Urea forms with isomerization.
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