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Cleavage - Development Biology
Cleavage or segmentation is a series of cell divisions of the fertilized .egg through which it is converted into a multicellular structure, called blastula. The main characteristics of cleavage include:
The cell divisions in the somatic cells are mitotic. The daughter cells or blastomeres or cleavage cells are also derived as a result of mitotic divisions of the zygote. We may ask whether there are any differences between mitotic divisions of somatic cells and, of the zygote and the blastomeres derived from it during cleavage.
What is Cardiac Transplantation ? Cardiac Transplantation : The first successful clinical heart transplant was done by Christian Bmnard at Cape Town in South Africa in 196
Q. What are the extraembryonic membranes present in vertebrates? The extraembryonic membranes that may be present in vertebrates are the yolk sac, the amnion, the placenta, the
Transfer RNA which is also known as tRNA is an adaptor molecule composed of RNA, classically 73 to 93 nucleotides in length, which serves as the physical link between the nucleotid
Synthesis of citratefrom acetyl CoA and oxaloacetate: Citrate synthase catalyses this aldol condensation reaction with the release of CoA. There are certain inhibitors to this re
Blotting is the technique for detecting one RNA within the mixture of RNAs (a Northern blot) or one type of the DNA within of a mixture of DNAs (a Southern blot). A blot can prove
introduction,types,uses and characteristics of a good timber?
What is Barfoed's test and its principle? This test is a specific test for monosaccharides. Principle This test is also a copper reduction test but differs from Fehling
Post-operative Nursing Care of Cleft Palate Objective of Care Provide adequate nutrition Maintain oral hygiene Apply restraints Promote speech Give
Nervous System of Echinoderms Previous to studying the nervous system of echinoderms, you have to bear in mind the peculiar organization of these animals. Here as well, the ne
An interesting observation made by an American biologist H.C. Bumpus (1899) provides a good explanation for normalising selection. Bumpus collected some 136 injured house sparrows
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