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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.
What are the structures that participate in the human auditory sensitivity? The structures of the human auditory sensitivity are the ears (external, middle and internal), the
Q. What is the adnexal organ of the digestive system in which bile is stored? How does this organ react to the ingestion of fat rich food? Bile is concentrated and stored in th
What is NADP and NADPH? NADP is the abbreviation of the nicotinamide adenine dinucleotide phosphate cation, a hydrogen acceptor. NADPH is made when NADP binds to one hydrogen a
Latitudinal Variations The latitudinal variation of temperature over the earth is the result of two main variables incoming solar radiation and the distribution of lan
Trichomonas vaginalis - Protozoan This cosmopolitan protozoan lives exclusively in the female vagina and male urethra or prostate. It causes a mild disease called trichomonas
type of nutrition in platypus and ant eater
What are the situations in which the environment can change the genotype of an individual? What is the condition for this type of change to be transmitted to the offspring? The
What is an organ that belongs to more than one organ system? One answer is the pancreas. It belongs to both the endocrine and digestive systems. Another one is bone marrow. It
Difference between Artificial selection and natural selection - S.No Artificial selection Natural selection 1. It
State the term in broad - Lunule. In sand dollars, notches or holes which pass through the body of the animal. Their function is not fully understood though may be involved in
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