Human population-historical overview, Biology

Assignment Help:

Human Population-Historical Overview

Throughout history, the human population has been quite small. It has grown relatively slowly and even experienced occasional declines. Figure shows the general trend of population growth in the last half million years. As said earlier, the dawn of agriculture, triggered a series of major global environmental changes.

2068_Human Population-Historical Overview.png

Figure: Human Population

As agriculture became more efficient, women began to bear more children and the human population increased. It was possible to grow more food in a given area of land. Hunter-gatherers were mostly nomadic and in their way of life, infants were a liability as children could not become very good hunters. Whereas, in a stationary agricultural society, babies are not much trouble and children can help in the farm. Therefore, the population increase between 10,000 BC and about 1800 AD was largely the result of increasing birth rates that coincided with the growth of agriculture.


Related Discussions:- Human population-historical overview

Cycles of matter, describe the path of nitrogen through its biogenochemicsa...

describe the path of nitrogen through its biogenochemicsal cycle

Illustrate nernst equilibrium potential for potassium ions, Illustrate Nern...

Illustrate Nernst equilibrium potential for potassium ions A complete motor neuron is removed from a frog and placed in normal physiological saline at 1 AM.  The neuron is hea

Can you explain aneurysm of aorta, Q. Can you explain Aneurysm of Aorta? ...

Q. Can you explain Aneurysm of Aorta? CXR findings are an enlargement of the involved portion of the aorta. A focal dilatation may simulate a mass or adenopathy. A more general

What is genetic engineering, What is genetic engineering? The Genetic e...

What is genetic engineering? The Genetic engineering is the use of genetic knowledge to artificially manipulate genes: It is one of the fields of biotechnology.

What is rounded st depression, Q. What is Rounded ST Depression? A roun...

Q. What is Rounded ST Depression? A rounded ST-segment depression pattern in the CM5 lead, as well as in the other leads, is common and is often associated with ischaemia. This

What is represented by the cellular secretion, Q. What is represented by th...

Q. What is represented by the cellular secretion? Cell secretion is the removal to the exterior of substances produced by the cell for instance, hormones, mucus, and sweat, so

What is leghemoglobin, The  nitrogenase  complex  is  extremely  sensitive ...

The  nitrogenase  complex  is  extremely  sensitive  to  inactivation  by  O2,  so  the enzyme  must be protected  from this reactive  substance.  During the root nodules of legumi

Stomata - water loss, Stomata - Water Loss The cross-section of a leaf...

Stomata - Water Loss The cross-section of a leaf shown in Figure shows the position of a typical stoma (plural stomata) which however, differs from species to species, with re

Disorders of pituitary function, Disorders of Pituitary Function: The ...

Disorders of Pituitary Function: The disorders of pituitary function result  in following conditions.  Hypopituitarism : Growth Hormone  (GH) Deficiency Hypopituitarism is

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