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How does the study of fossils strengthen the theory of evolution?
The study of fossils reveals ancient and extinct species having many same structures to others of the present and of the past. Fossils still permit radioactive dating to estimate the periods during which species lived and to establish a chronological relationship among them. Those evidences strengthen the hypothesis of relationship and common origin between species and that their features have modified gradually unless the formation of the current species.
Endomyocardial biopsy helps in understanding that carditis can cause CCF in patients with rheumatic heart disease but frequency of diagnostic features on EMB is found only in 17 pe
What are the principal sources of excessive nitrate and phosphate in rivers and lakes?
Define Immediate and Longer term Adjustment to Altitude Hypoxia? Arterial hypoxia precipitates the immediate physiological adjustments to altitude and process of acclimatizatio
Formation of Vegetative and Generative Cells The division of a pollen grain results in two unequal cells-the vegetative cell and the generative cell. The pollen grain is herea
Name some Drugs to prvent tuberculosis Pyrazinamide can cause morbilliform rash, arthralgias and asymptomatic hyperuricemia, and blocks the hypouricemic action of allopurinol (
Passage of Pollen Tube In cotton, the pollen produces a tube within an hour which grows on the surface of the stigmatic hairs, and then between the cells of the stigma at the
What is the role of mineral salts in the creation of electric tension (voltage) at the cellular level? The electric activity of the cell, for instance, in neurons, depends on
Explain about the Deficiency of Riboflavin? Riboflavin deficiency results in the condition of hypo- or ariboflavinosis, with sore throat, hyperaemia (condition in which the bl
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