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

Explain inhibitors, Explain Inhibitors Inhibitors: Citrate synthase i...

Explain Inhibitors Inhibitors: Citrate synthase is inhibited by ATP, NADH, succinyl CoA and acyl CoA derivative of fatty acids (fatty acyl CoA). The rate of the reaction  is

Explain simple staining technique, Explain Simple Staining Technique? H...

Explain Simple Staining Technique? Here single staining agent is used to determine the size, shape and arrangement of bacterial cells. It is simple and easy to perform. Dried s

Structure of the vascular cambium, Structure of the Vascular Cambium T...

Structure of the Vascular Cambium This meristem, in the anatomical sense of the term usually includes two histologically distinct kinds of cells: i) Fusiform Initials, i

Explain the dietary management in trauma, Explain the Dietary Management in...

Explain the Dietary Management in Trauma? Trauma As a result of metabolic responses to injury, there is an increase in the energy expenditure. Oxidation of body fat stores take

Acute and chronic tonsilitis, Acute and Chronic Tonsilitis: Tonsilitis...

Acute and Chronic Tonsilitis: Tonsilitis refers  to the inflammation of  tonsils and lymphatic tissue that are located on each side of oropharynx. Acute infection of  tonsils

Explain ribavirin, Ribavirin (Copegus, Rebetol, and others)  Combinatio...

Ribavirin (Copegus, Rebetol, and others)  Combination treatment of HCV with peginterferon alfa and oral ribavirin has produced higher sustained response rates than peginterfero

Define the importance of iodine in human, Define the importance of Iodine i...

Define the importance of Iodine in human? Iodine derives the nutritional importance as a constituent of thyroid hormones, 3,5,3',5' tetraiodo-thyronine (thyroxine or T 4 ) and

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

Female reproductive system of frog, Female reproductive system of frog: ...

Female reproductive system of frog: i) Ovaries : a) There are a pair of ovaries present in the abdomen. b) They are grayish or blackish in colour. c) There are numerous cham

Explain what is molds , Explain what is Molds ? Zygomycota, or molds, a...

Explain what is Molds ? Zygomycota, or molds, are a type of fungus made of filamentous hyphae that grow on decomposing material. The molds actually aid in the decomposition pro

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