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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
Active Transport We have mentioned above that Transmembrane potential develops due to active transport of ions (H + ) outside the cell. Since this transport takes place again&
Q. How is the circulatory system of reptiles characterized? What is the basic difference between the amphibian and the reptile heart? The circulatory system of beings of the cl
Define Erythropoietin A. acts by stimulating the production of red blood cells by the peritubular interstitial cells of the kidney cortex. B. is secreted by cells in the bon
What is Congenital Mitral Stenosis ? The onset of symptoms or signs depends on severity of the stenosis, severe the stenosis earlier the presentation. With significant MS, the
GRADIEN T THEORY - It was given by T. Boveri & was supported by M.C. Child. Child called it as metabolic axial gradient theory. According to it, the egg has distinct ani
In genetic recombination by crossing over what is the difference between parental gametes and recombinant gametes? Parental gametes are those gametes that keep the original lin
Lack of iron in the photic zone of the ocean restricts the size of plankton population.Iron is what kind of factor for marine plankton?
When a wound occurs in humans, platelets in the blood activate a substance that starts clotting process. The substance which starts clotting is: a) Adenosine (pron: ah-den-ah-s
Modern Biology Increasing advancement in biotechnology has brought about a veritable explosion of Biological knowledge since early 1950s.This vast modern biological information
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