Fire and cookery , Biology

Assignment Help:

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.  


Related Discussions:- Fire and cookery

Action of natural selection in changing environments, Directional or progre...

Directional or progressive selection is the mode of selection associated with environmental change. We said earlier that in an unchanging environment stabilising selection removes

Which type of gamete produced by a heterozygous individual, Which is the ty...

Which is the type of gamete produced by a heterozygous individual? What is the genotypical proportion of these gametes? Heterozygous individuals, for instance, AA, produce two

Planeria, differnce between protonephridia and metanephridia

differnce between protonephridia and metanephridia

Is heart patient can do exercise or not, Is heart patient can do exercise ...

Is heart patient can do exercise Advise the patient to consult the doctor before starting any exercise. Doctor will advise the patient to choose exercises as per his condition;

Define absolute food safety and relative food safety, 'Absolute  food  safe...

'Absolute  food  safety'  is  the  assurance that damage  or  injury from use  of  a substance is impossible. Normal 0 false false false EN-US X-NON

Explain risk factor global perspective in heart dieases, Explain risk facto...

Explain risk factor at the global perspective in heart diease? While the risk of Cardio-vascular diseases has been found to be variable in different ethnic groups with the high

Reproduction, what is the difference between anisogamy and oogamy?

what is the difference between anisogamy and oogamy?

Metabolism of lipids, The three main forms of fat found in food are glyceri...

The three main forms of fat found in food are glycerides (principally triacylglycerol [triglyceride], the form in which fat is stored for fuel), the phospholipids, and the sterols

Where do pga and glycine gain entry, Where do PGA and glycine gain entry re...

Where do PGA and glycine gain entry respectively after being formed during photorespiration in plants? What occurs to them immediately after?

Animal versus plant metabolism, Which of the following BEST characterizes g...

Which of the following BEST characterizes gas exchange in animal versus plant metabolism: Animals take in O2 and release CO2. Plants take in and release both O2 and CO2. Both anima

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd