Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Fire and Cookery :
Fire and Cookery where and when fiie came to be used is not known. Fire, to start with, must have been a frightening thing, giving rise to many myths and legends. However, as man slowly learned to control it, he found it very useful to keep himself wann and to frighten away wild animals. It is easy to imagine that chance eating of burnt or charred flesh must have led to the idea of cooking, which then made even tough meat edible and tastier. Thus, it must havetremendously increased the number of things one could eat. It was, perhaps, from the use offire for cooking that fired clay pottery and melting of metals for making tools arose.
Boiling gave rise to certain difficulties. At first, water was heated by dropping hot stones into water in leather buckets. We find such itones, cracked by heating and chilling, around prehistoric sites. The crucial discovery, however, was that by coating a basket with thick clay it could be put on the fire. Eventually, towards the end of the Stone Age. it was -discovered that coated baskets crack while heating, whereas pots made of heat-treated clay do not crack. Fired pottery was, tlrerel'ore, a very significant discovery. l.'inally, as Lhc problem of storing liquids for long periods in clay pots was tackled, the slower chemical changes of fermentation could be noted and later used for brewing wine. From the use of dyes, paints and tanning as found in this epoch, we can infer that the use of rudimentary chemistry for transforking materials was also in progress in the later part of the Stone Age.
Speculate on the necessity of interdependence of volvox organisms in the colonial existence
True or false, adaptations are the result of finding the best or only solution to a given problem a species faces.
Define Advantages and Disadvantages of Swab Method? Advantages of Swab Method 1. Suitable for flexible, uneven and heavily contaminated surfaces. 2. Rapid, simple and ine
Define Malnutrition - Effects on Milk and Effects on Mothers? Milk is the sole source of nourishment for many infants for upto 6 months or a year or even more. Therefore, the r
Mechanism of Phloem Transport The efficiency and magnitude of translocation of food material are evident from the annual yields of various crops and fruits. Now, the question
Define Food Science and Simple Sugars? This first unit introduces the concept, scope and importance of food science and technology as a discipline. It further presents a detail
Explain herbicide tolerant crops Candidates who reached the scholarship standard demonstrated a wide general knowledge of the living world to which they could relate biologi
You now know that natural seleqtion aims at evolving adaptations of organisms in response to environmental changes in the inanimate world. Also many adaptations arise due to intera
sanguivarous mode of feeding in annelida
What is an endospore? An endospore is a specialized, highly resistant, dormant structure formed within the vegetative cell of some bacteria e.g. Bacillus (rod), Clostridium (ro
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd