Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
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.
Bacterial and Mycotic Diseases Bacteria and fungi are microscopic organisms which are ubiquitous in nature and are widely present in soil, fresh and salt water, air, vegetation
a) Which region of the retina gives the most accurate interpretation of the image? b) What type of light-sensitive cell is present in this region? (a) The fove
Q. Does the fish heart pump venous or arterial blood? After oxygenation in the gills the arterial blood goes to the tissues so the fish heart pumps venous blood, the venous blo
CONTRACTI L E CELLS In addition to above mentioned three types of muscular tissue, there are contractile cells. These are as follows. 1. Myoepithelial Cells (= M
Pick up just a tiny bit of soil and you will discover a whole new world. Researchers have found that one pinch of soil may contain more than 30,000 protozoa, 50,000 algae, 400,000
You have discovered a novel alternatively spliced gene (gene X) and you wish to study its regulation in an in vitro splicing assay. The alternatively spliced product retains intro
Are the xylem and the phloem made of living cells? The cells that constitute the xylem ducts are dead cells killed by lignin deposition. The cells of the phloem are living
What is peristomium. Describe? The segment behind the prostomium in annelids which contains the oral opening. This segment like the prostomium isn't a true segment and has no s
Explain the Clinical Features of PS and VSD ? Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
1. Explain how bats determine the distance (range) of their target using echolocation. Be sure to describe the properties of their call that make it possible (use a sketch), and ho
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd