Human population-historical overview, Biology

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.

Posted Date: 1/21/2013 1:41:10 AM | Location : United States







Related Discussions:- Human population-historical overview, Assignment Help, Ask Question on Human population-historical overview, Get Answer, Expert's Help, Human population-historical overview Discussions

Write discussion on Human population-historical overview
Your posts are moderated
Related Questions
What is the lymphatic system? The lymphatic system is a network of specialized valved vessels that drain interstitial fluid (lymph). The lymphatic system is also responsible fo

Explain Theory of enzyme action L. Michaelis  and k L. Menten developed a general  theory of enzyme action and kinetics  in  1913. According to this theory, we learnt  that

sub classes of class pisces

What are the three periods into which interphase is divided? Interphase is the preceding phase to the mitotic division. It is separated into three periods, G1, S and G2 (the l

Define Reagents for seliwanoff's test? - Sugar solutions of glucose, fructose, galactose, lactose, maltose, sucrose and starch - Resorcinol in dilute hydrochloric acid (1:

ATP-sensitive potassium channel?   A.  In smooth muscle cells surrounding an arteriole serving a region of the body that has just recently had very high levels of cellular acti

Explain acylglycerols The most abundant class of food lipids is the acylglycerols, also known as glycerol esters of fatty acids, which dominate the composition of depot fats in

What is Intermittent ST Depression ? Ans. Several patients progress from variable ST-segment depression, often associated with respiration, to the classic ST-segment chang

Explain about Stacking faults Stacking faults happen in a number of crystal structures, but the common example is in close-packed structures.  Face-centered cubic (fcc) struct