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 cap site, Cap site Two usages are given below: 1] In eukaryotes...

Cap site Two usages are given below: 1] In eukaryotes, the cap site is position in the gene at which transcription begins, and really should be called the "transcription initia

Risk factor modification, Risk Factor Modification :  Even after CABG,...

Risk Factor Modification :  Even after CABG, patients are at risk of progression of native coronary artery disease and development of lesions in the conduits. Modification of

Define assessment of calcium status and calcium requirements, Define Assess...

Define Assessment of Calcium Status and Calcium Requirements? There is no biochemical indicator, which can clearly reflect calcium status. It has also been seen that in case of

What are the major terrestrial biomes, What are the major terrestrial biome...

What are the major terrestrial biomes? The main terrestrial biomes are: tundra, taigas (or boreal forest), temperate forests, tropical forests, grasslands and deserts.

Role of nacl in metabolism, ROLE OF NaCl - It forms .9% of blood of ...

ROLE OF NaCl - It forms .9% of blood of mammal. It forms .7% of blood of frog. Bicarbonates of Na+ act as buffer for pH constancy. Involved in active transport of gluc

Functional principles of excretory organs, Normal 0 false fal...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Maintenance of gut lining, Maintenance of Gut Lining After studying th...

Maintenance of Gut Lining After studying the digestive enzymes you would wonder why the gut linings are not digested themselves. This is because animals have several mechanism

The lowest and highest temperatures humans can survive, What are the lowest...

What are the lowest and highest temperatures humans can survive? Being in cold temperature air with proper shelter and clothing, humans can endure indefinitely, even if the tem

Phylum, what is phulum cnideria

what is phulum cnideria

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