Domestication and rearing of Sus domestica - Piggery
Pavan Chaubeyy
by Unknown
1w ago
The domestication mestication and rearing of pig  or Sus scrofa domesticus for commercial purposes is called piggery. Pig has been widely used as diet by various tribes. Piggery stands at good position among the small scale industry because pig is cheapest and best among the farm animals. The oestrus cycle of pig is completed with in 20 to 21 days in normal condition. In mature pig the vulva start to swell due to release of orstrin hormone by the follicles. During this period if female pig mates two time than youg ones are produced more than normal mating. The mating period takes 3 ..read more
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Animals as source of leather, Process and steps used in leather industries
Pavan Chaubeyy
by Unknown
1M ago
  Goat , Sheep Cow Buffalo, lamb,  snake, tigers crocodile etc are used  in leathers industry. Remember??The skin of cow is called as kips whereas the skin of Buffalo is called buffs. Process of skin industry Flaying -The traditional job of flaying is done by the hereditary peoples. During the process of flaying, some amount of flesh and tissue is attached with the skin to increase the weight of leather. This is also useful when a knife is used to cut the skin.The carcass is hanged with a pole with the hind limb upwards and peoples pulls the skin over the back of dea ..read more
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Microbes used in Production of vitamin
Pavan Chaubeyy
by Unknown
2M ago
Microbial production  is only source of vitamin B12 but vitamin B2 or riboflavin  is also manufactured up to some extent microbiologically. Remember ??only water soluble vitamin can be produced commercially with the use of microbes.  Any fat soluble vitamin has not been synthesised so far with the use of microbes.  Beta carotene which is converted into vitamin A , can be synthesised by use of  microbes. In nature, vitamin B12 is synthesised by metabolic activity of microbes. It is synthesised by bacteria streptomyces and not by any yeast or fungi. It also is said ..read more
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Pearl culture , Method, Process, composition of pearl
Pavan Chaubeyy
by Unknown
5M ago
  The pearls are of variable shapes and sizes. They may be white, or cream red or pink red in colour. The spherical pearls of rainbow colour are rarely found. The best quality of pearl is obtained from marine oysters. Pearl obtained from freshwater bivalves are not as valuable as those obtained. Pearl comprises of  Water: 2-4%, Organic matter:3.5-5.9%,  Calcium carbonate: 90% residue 0.1 to 0.8%                                                    &nb ..read more
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Animal as source of Lac - Lac culture
Pavan Chaubeyy
by Unknown
7M ago
  Lac is used in toys, bracelets, sealing wax also used in  filling ornaments, for manufacturing of varnishes and paints, for silvering the back of mirrors etc. Waste materials produced during the process of stick lac are used for dying purposes. Nail polish is a good example of the by-product of lac. Lac culture refers to the domestication and rearing of lac insects on the  scientific basis  to get  a high amount of quality lac. Lac is a kind of resin secreted by the lac in­sects. India is a major lac producing country followed by Thailand. Lac is best said to be a ..read more
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A complete study about the Evolution of Human or Phylogeny of Human
Pavan Chaubeyy
by Unknown
8M ago
  It has been regarded that the phylogeny of humans started from Gorillas and chimpanzees like Ape  who existed around fifteen million years ago. These were called Dryopithecus and Ramapithecus. It is to be believed that Dryopithecus were more app-like whereas Ramapithecus was more man-like. It is also to be believed that most of the evolution of humans takes place in East Africa like Ethiopia, Tanzania, Kenya. Although the remains of humans have been found in other parts of Africa, Asia and Europe. Fossil bones  with hominid features have indicated that man-like primates walk ..read more
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Genetic Equillibrium - Hardy and Weinberg
Pavan Chaubeyy
by Unknown
9M ago
  Population genetics is the study of gene frequency in the population and  their change under varied conditions. Population or Mendelian  population is a group of individuals present in a geographical area which has a common gene pool.  Gene frequency of the percentage of an allele in relation to the total allele  present in a population. All the genes and their alleles in the population create a gene  pool. A change in relative frequency of allele  brings the evolution. This occurs due to some selective pressure but normally the allele tries to maintai ..read more
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Theory Examples Concept of Lamarck regarding the Evolution
Pavan Chaubeyy
by Unknown
10M ago
  Jean Baptiste de Lamarck Was a French naturalist and gave the theory of Inheritance of acquired character with reference to evolution. This illustration of Lamarck was quite different from Theory of Darwin. It was published in 1809 in his book philosophie zoologique. According to this theory the characteristics  that are acquired by an organism during their lifetime in response to environmental conditions are passed to their offspring.The theory of Lamarck can be understood by the following basic features - Organisms and their organs have a natural tendency to continuously inc ..read more
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A series of theories of evoiution given by Charles Darwin
Pavan Chaubeyy
by Unknown
11M ago
  Charles Darwin was a British Naturalist and worked suddenly on Evolution. He conducted a sea voyage  around the world on his own made ship HMS Beagle. During his Sea voyage he visited Galapagos island in South America. On this island he observed various changes in species, especially in the beak of birds. These were named as Darwin finches which are also example of Adaptive radiation. Darwin thought about how these changes appeared in species on this island. ??Remember - Darwin had been influenced by an essay on Population written by Thomas Malthus. These changes were named as ..read more
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Adaptive Radiation - A Brief concept with Examples
Pavan Chaubeyy
by PAVAN CHATURVEDI
1y ago
  Adaptive radiation is the evolutionary process by which many species originate from a common ancestor  in an area and radiate  to form other different species. The phenomenon of adaptive radiation was first observed by Darwin when he visited Galapagos Island. Adaptive radiation  has developed great morphological and ecological diversity. The main reason behind adaptive radiation is the adaptation of organisms to new ecological niches. The  examples  of adaptive radiation are  Darwin's finches  on the Galapagos island, Marsupial animals  in Aust ..read more
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