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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.
Define Food processing unit operations? Food processing unit operations are involved in the engineering aspects of food processing, packaging and storage. Heating, cooling, dry
Q. Do echinoderms present external or internal fecundation? Is there sex division among individuals? The fecundation in echinoderms is external, gametes are liberated in water
Metamerism oe Segmentation In the early coelomates the coelom was not divided into segments, the whole body cavity was a single space. Hence body movements were not precise.
Q. What are the main characteristics of the age pyramids of developed countries? In the stabilized human population the age pyramid has a narrower base since the reproduction r
What does skin color in man shows?
What is Atrial Switch operation and Rastelli in Heart dieases? Atrial Switch Operation: (Senning or Mustard procedures) By means of a baffle the systemic venous blood could b
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
Assume that a dihybrid cross (AaBb X AaBb) is made in which the gene loci are autosomal, independently assorting, and incompletely dominant. What phenotypic ratio would you expect
Explain Cardiac Type of TAPVC (Draining into Coronary Sinus) ? Initial steps of the operation are the same as described earlier. The right atrium is opened and the roof of the
excretory organ of agama lizard
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