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Fertilization - Development Biology
Previously you knew the process which leads to the differentiation of the male and female germ cells, the sperm and ova, respectively. In this section we shall describe the process by which the sperm and the egg unite to form a zygote. This process is known as fertilization. Fertilization results in
Activation would essentially mean that a sequence of metabolic and morphological changes are triggered that in turn cause the division of a unicellular zygote into a multicellular organism. Mostly we will describe the fertilization in mammals with occasional references to sea urchins. It is true that depending upon the habitat as well as the life styles there may be variations in the fertilization process in diverse organisms. But generally the events of fertilization are more or less similar in many different organisms. Prior to the actual fusion of the sperm and the egg nuclei, the germ cells prepare themselves for the fertilization process.
Pathophysiology Large haemorrhages and fibrinous lesions vegetate along the inflaked edges of valves. The lesions develop on adjacent valve leaflets so that the edges adh
Evolution: This deals with the origin of newer types of organism from the previous ones by modification involving genetic changes and adaptations. Evolution also called as biologic
DK is a year old female who was born after a normal pregnancy and delivery. At 17 months of age DK showed signs of speech delay, increased lethargy and vomiting up to four times p
Method to Estimate Phytochrome Since there is no chemical test, the only method available to test and estimate phytochrome is the spectrophotometric method. Firstly, the diffe
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Explain about the Foods Effect on Drug Utilization? The following illustrations highlight the effect of food on drug utilization. Liver and green leafy vegetables can decrea
What is suisidel bag in plant?
Define the meaning of Population Structure? The structure of population can be viewed as to how the population is composed of in terms of age and sex. The structure of populati
Explain the Primary Stain - Ziehl-Neelsen Method? Ordinary aqueous stains like methylene blue, crystal violet, etc. are not able to stain most of the species of Mycobacteria. C
Seed A seed is a mature ovule enclosing an embryonic plant, stored food material (in endosperm, persistent nucellus or embryo itself) and a seed coat formed by one or two inte
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