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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.
Composite Endosperm - Variants of Endosperm In the family Loranthaceae, the development of endosperm is unique. The ovary lacks ovules. The sporogenous tissue located at the b
Q. Why does thermal inversion increases air pollution? What harm can thermal inversion cause to humans? The Thermal inversion confines at low altitude a layer of pollutants tha
excretory system in agama lizard
Transfer of pollen grains from the anther to the stigma of another flower of the similar plant is known as? Geitonogamy
explain in brief about phyletic lineage?
Q What are the biological troubles that molluscs face due to their soft body? Because molluscs have a soft body they are further fragile. They also have more complexity to supp
What are the typical features of mammals? The typical features of mammals are: body (more or less) covered with hair; presence of the diaphragm muscle (that divides the thorax
Carbohydrates are the next important nutrients as they have to perform a variety of functions such as: 1) Provide major source of energy 2) Breakdown of fatty acids and preve
What are compound eyes? Arthropods have compound eyes made of many visual units called ommatidia. Every ommatidium transmits visual information by the optic nerve to the brain,
Classification of the reasons of implant failure: In order to understand failures it is vital to know, why they occur. The reasons are plenty and to streamline, these have been
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