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Q. What is an evolutionary tree? Is there a precise evolutionary tree known by science that explains the emergence and origin of every type of living being?
Evolutionary tree is the schematic and pictorial representation of evolutionary relations among species of living beings in which the trunk (or a preceding branch) represents common ascendants of species and groups of living beings that are distributed along its branches according to hypothesis on their origin. For instance, today it is admitted that birds and mammals are two distinct branches of the same preceding reptile branch.
Biology cannot guarantee a definite evolutionary tree (phylogeny) on the species of living beings that live or have lived in our planet. There are many knowledge gaps and many data to be discovered to be filled. One of the mainly promising methods to study phylogeny is the comparison of DNA molecules from different groups of living beings researching similarities and differences in nucleotide sequences that may indicate less or more relatedness among species.
Protein Folding With all the known information of protein structure from X-ray and NMR studies and one might expect in which we would know how proteins fold up within structure
What is Knot tying Once the suture is satisfactorily placed, it must be secured with a knot. The instrument tie is used most commonly in cutaneous surgery. The square knot is t
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Explain Insect resistant crops in Evolutionary way Insects are a natural selection pressure so plants resistant to certain insects could have an evolutionary advantage (in
Explain the Photosensitive Detectors? A wide range of detectors varying in senstivity and cost are available. They contain a light sensitive surface that releases electrons in
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Explain the Birth in human biology? In humans, birth of the infant occurs about 270 days after conception. The period during which the uterus contracts to expel the newborn
Explain about Bone lining cells Bone lining cells are basically inactive osteoblasts (in terms of making bone) that line bone surfaces. Osteocytes are osteoblasts that have be
genral charecter and classificatin of porifera
Human Impact on Nitrogen Cycle Human activities are profoundly affecting the cycling of nitrogen in nature. Over 30 x 10 6 metric tons/yr. of N 2 is fixed in the commercial
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