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In the last unit we traced the human evolutionary history mostly from a palaeontological viewpoint. Although still fragmentary, the available fossil evidence makes it possible to construct a more or less coherent story of human origin and its development. Besides suggesting a primate ancestory, fossil evidence has indicated various trends in human evolution. Today the modern man is regarded as a climax of the evolutionary process. But several questions are raised as to which direction the human evolution is proceeding now and what direction will it take in the future. Is the be-all and end-all of all the evolutionary process? Or do human beings continue to evolve biologically? It may not be possible to provide a direct answer to these questions since evolution is a long term process and the effects could be visualised only after tens of thousands of years.
Illustrate in detail about the Cell The present day study of cells combines many scientific disciplines, like biochemistry, biophysics, genetics, microscopy and physiology. A g
How does chemical adsorption of a gas on a solid vary with temperature? a) Mention the main reason for the anomalous behaviour of lithium in Group of the periodic table.
What are the types of brain?
Pheromones Serving Functions Other than Reproduction Besides sexual responses as described above pheromones mediate several other types of behaviour. Alarm pheromones have bee
Light and Distribution We have mentioned in the beginning that the variation in the amount of light generally affects the global and local distribution of plants and animals. L
Sucrose, or table sugar, can react with water to produce two other compounds, glucose and fructose. Though, when you add sugar to a glass of water, this reaction proceeds ext
PR E FORMATION THEORY - Proposed by Marcello Malpighi. Studied chick egg and proposed his work in "De ova-incubato". According this different part of embryo previousl
Give three examples of reflex actions. Examples of reflex actions are alter in size of the pupil of the eye in response to light intensity, blinking in response to foreign par
human digestive system and the functions
in the oneward form
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