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Is crossing over important for the diversity of biological evolution?
Sexual reproduction and recombination of linked genes (crossing over) are, with mutations, the main instruments of biological variability. Sexual reproduction allows many combinations among genes situated in different chromosomes. Crossing over, though, is the only means to provide recombination of alleles located in a similar chromosome. Crossing over probably emerged and has been maintained by the evolution because of its importance to biological diversity.
Gill slits are the opening or the clefts between the gill arches in the fish. Water taken in by the mouth passes through the gill slits and bathes the gills. It also has rudimenta
Illustrate the term Cilia? A cellular hairlike locomotory structure which comprises an extension of the plasma membrane surrounding a 9+2 organization of microtubules. Unlike f
Disease Prevention for the High Risk Group Interventions aimed at early diagnosis and appropriate management for reducing morbidity and mortality targeting people who suffer
Define Fish as a rich source of protein? The edible portion is skeletal muscles of the body. Even though the skeletal muscles of different animals are basically similar, fish s
Structural isomers: Select one: a. Have the same molecular weight b. Have the same connectivity c. Are mirror images d. All of the above e. None of the above
X-ray Chest It is helpful in assessing heart size. One should look for presence of pericarditis, pulmonary oedema or pulmonary congestion. ECG One should look for pro
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Entropy is the degree of disorder in a system. As the energy is transferred from one form to another form, some of it is lost as heat; as the energy decreases, the disorder in sys
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Heat Production In the Homeotherms heat production must be elevated if the ambient temperature falls below the critical temperature. Although all metabolic processes result i
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