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

How to calculate fractional shbrtening, Q. How to calculate Fractional Shbr...

Q. How to calculate Fractional Shbrtening? With the cursor- beam cutting the left ventricle just beyond the tips of mitral valve in an adequate parasternal long axis view,

Explain phylogenetically proximal species, Q. Do the phylogenetically proxi...

Q. Do the phylogenetically proximal species have cells with proximal chromosome counts? The number of chromosomes typical of each species is proximal for phylogenetically proxi

Obstetric ultrasound , Title Legal aspects in obstetrical ultrasound  ...

Title Legal aspects in obstetrical ultrasound  Introduction Obstetric ultrasound is an essential component of antenatal care and it is widely perceived to be associated

Why is the krebs cycle also called the final common pathway, Why is the Kre...

Why is the Krebs cycle also called the final common pathway of the degradation of organic compounds? The Krebs cycle is known as the final common pathway of the degradation of

Define factors which may lead to errors in count, Define Factors Which May ...

Define Factors Which May Lead To Errors in Count? There are many factors, which may lead to errors in count. (i) Counts may be low if the agar medium used in the technique d

Define about the pancreatic cancer, Define about the Pancreatic Cancer? ...

Define about the Pancreatic Cancer? This is a condition often associated with abdominal pain, anorexia, nausea, and vomiting and weight loss. Ealing may aggravate pain. There m

Explain isoniazid, Explain Isoniazid It is the drug of choice for treat...

Explain Isoniazid It is the drug of choice for treatment of latent TB infection. It should be given for 9 months in a single daily dose of 300 mg for adults and 10 mg/kg (max 3

Shivering - heat production, Shivering - Heat Production The mechanis...

Shivering - Heat Production The mechanism of thermogenesis with which we are more familiar is shivering and all adult birds and mammals seem to use these mechanism. Shivering

What is the function of vitamin e, What is the function of vitamin E? In wh...

What is the function of vitamin E? In which foods can it be found? Vitamin E, or tocopherol, is a fat-soluble vitamin that participates as coenzyme in the respiratory chain, t

State the basic properties of cell, State the basic properties of Cell ...

State the basic properties of Cell The differences of cell types notwithstanding, the similarities among them are more profound. Actually, all cells possess the same basic prop

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