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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.
How are the organelles of a single cell like the organs of a multicellular organism? Name two features of eukaryotic cells that prokaryotic cells lack.
What is condition for the Mendel's second law to be valid? The Mendel's second law is only valid for genes located in various chromosomes. For genes situated in the similar chr
PHYSIOLOG Y OF RESPIRATION - 1 . EXCHANGE OF GASES - It is Haemotasis. It takes place in Alveoli between alveolar air and arterial cappilary by diffusion i.e., f
Describe Systolic Sounds in heart dieases? Early Systolic Sounds: Aortic or pulmonary ejection sounds are the most common early systolic sounds. These are high frequency soun
Classification of agro-industrial byproducts Based on their nutrient content agro-industrial byproducts can be divided into: 1. Feed low in fiber and low in protein. These ar
Financing of Healthcare - Constraints One of the major constraints to improve the healthcare delivery system in developing countries is weak public sector management. These ec
How is price mechanism or supply and demand concerned? The price mechanism or supply and demand: The price mechanism or supply and demand is concerned with how buyers
Water is considered a universal solvent because- Select one: a. it can dissolve polar and non-polar compounds b. it can dissolve both positively and negatively charged ions a
Over the past decade, the conceptual understanding of heart failure has changed significantly. Several large clinical trials have demonstrated that non-pharmacological and pharmaco
Is it possible for a hermaphrodite species to present cross-fecundation? There are hermaphrodite species of animals and plants that present cross-fecundation mainly because of
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