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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.
Q. Explain Restricted fragment polymorphism? This method makes use of a group of enzymes termed restriction enzymes which recognise particular sequence of DNA and act as "molec
how are the listed from largest group to smallest group
What is the difference between monosaccharides and disaccharides? What are some examples of disaccharides and of monosaccharides that form them? Monosaccharides are simple mole
In the preceding block you learnt the Darwinian premise of natural selection based on certain facts and deductions thereof. You would have noticed that one of the foundations for t
There are several kinds of pollution, main among them are as follows:
Adverse Effects The most common adverse effects of itraconazole are dose-related nausea and abdominal discomfort. Rash and serious hepatic toxicity can happen. The drug can ca
Nasopalatine nerve and vessels Found in the nasopalatine canal, must be taken care off when placing implants in the maxillary incisor region. Subperiosteal implant placement o
Endocrine glands Endocrine glands have no ducts - so these are also called as ductless glands Eg.Pituitary etc., These glands secrete chemical substances called HORMONES
What are the processes involved in the preparation of plant tissue for free hand sectioning?
Some species of plant are strongly adapted to pollination by certain insects. Characteristics which are regarded as adaptations to pollination by bees are: ( a) white o
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