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Why does geographical isolation lead to speciation?
The Geographical isolation between groups of the same species leads to formation of a new species since it disallows crossing among isolated individuals. The Distinct characteristics from the other groups are incorporated by genetic variability and natural selection into the isolated groups until the emergence of a new species. So that the geographical isolation creates the reproductive isolation.
Feeding Mechanisms of Animals All animals have evolved successful methods for extracting their required nutrition from the environment. Thus we find a diversity of feeding mec
Explain the Filtration - Air Sampling? Filtration - Air stream may also be filtered through a micro-filter. Microorganisms are released from the filter using a suitable diluen
Which of the following serves as an effector, or as part of an effector, that functions in a negative feedback system? A. Glucagon Receptors in the plasma membranes of alpha-is
Describe the meaning of Electrical Stimulation Brain stimulation has been used to map connections in the brain and to elicit changes in behaviour. Much of the pioneering work o
Q. What are the major cells of the connective tissue proper? What is the name given to the intercellular material that surrounds these cells? The major cells of the connective
EGG S OF FROG This egg is round & its diameter is of 1-2 mm. It is mesolecithal & has distinct animal pole & vegital pole. The nucleus is found in the centre of the anim
What is the contraceptive mechanism of the IUD? The IUD (intrauterine device) is a piece of plastic coated with copper that is inserted within the uterus by a doctor. Copper is
why we add some sodium bicarbonate in water?
1. Awareness - First people become aware of a problem. 2. Acquire Knowledge and skills - Next, they gather knowledge and learn new skills. 3. Motivation - At the next stag
why we call leech as sangivorous
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