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Fission - Asexual Reproduction
In this process the organisms divide mitotically into two or more equal sized parts. Division of the organism into two daughter cells is known as binary fission, which is characteristics of protozoans. The daughter organisms produced carry all the cytoplasmic organelles of the parent individual.
They also carry the same genetic material as found in the parent organisms. Some organelles like mitochondria divide at the time of division, while others like flagella and contractile vacuoles arc formed afresh by the daughter organisms. Protozoans at certain times also exhibit sexual reproduction. Their gametes are produced meiotically and mating takes place. In the following subsection you shall read about sexual reproduction in protozoans.
Before we further proceed to discuss the fossil history of the humans we shall briefly look into what distinguishes humans or genus Homo from his ancestors namely the apes. These d
Environmental factors of viscosity and plasticity a) Temperature affects the viscosity of a colloid. Generally, its viscosity decreases as the temperature increases. For e.g.
history of zoology
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Basic Planes of Cleavage The basic planes along which the egg and its daughter blastomeres are divided during early cleavage are: A. Meridional Plane - the cleavag
Monosaccharides :- Sugars consisting of a single polyhydroxy aldehyde or ketone unit.
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Q. Why is the concept of a single gene as ultimateunit of inheritance inadequate to provide a unitary explanation for protein synthesis, recombination and mutation? Answer:
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Conduits Figure: Venous Conduits Reversed saphenous vein was the first conduit used for CABG. 'It is usually harvested from the leg starting above the ankle going up
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