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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 is a recessive gene? With the birth of a child, it gets its genes from both parents. Some genes 'override' other genes. Using hair color as instance: If single parent i
Why does the recombination frequency of genes vary with the distance between them in the chromosome? The farther the distance among the loci of two genes in a chromosome the hi
Amino acid sequence is also known as the primary structure of a protein/polypeptide; the series of amino acids in a protein/polypeptide controlled by the series of DNA bases.
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respiratory system in amphibains
Explain Class Bivalvia in animal kingdom? This name of this Class reflects the group's most distinguishing feature. Clams, oysters, scallops and mussels all have two shells tha
Define Measuring Direct Aerobic Fitness (VO 2 max) For direct measurement of VO, max, the subject is asked to perform exercise for 12 to 15 minutes. A stationary bicycle or a
COPUL A TIO N - Followed with the help of penis. Sperms are ejaculated deep in vagina. Polyestrous i.e. can capulate any time thorughout the year.
Define about the Ishihara's Plates of eyes Ishihara's Plates: Following plates are available- Transformation, Vanishing, Hidden Digit and Diagnostic plates. 1) The plates ar
Q. What are hormones? Hormones are substances collected by the circulation and secreted by the endocrine glands that act to produce effects upon specific tissues and organs and
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