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.
A true-breeding petunia plant with red petals was crossed with another true-breeding petunia plant with white petals. The plants of the F1 progeny had blue petals. When these F1 pl
What is plant cell walls made of? Explain the function of cell walls? Plant cell walls are made of cellulose embedded in carbohydrates and proteins. Cell walls help su
Patterns of Metamorphosis The pattern of metamorphosis is not the same in all insects and so metamorphosis can be broadly classified into 3 types: (1) Complete metamorphosi
how we attempt a question of phylum annilida in exam?
Which of the following will lead to a decrease in the amount of oxygen delivered to the body cells in a leg? A. A decrease in hydrogen ion concentration in red blood cells in t
Q. Explain about Glycemic Index? Although the use of exchange lists is still popular for planning diabetic diets, it has been realized in recent years that in exchange lists th
How do you determine net atp production after complete oxidation to CO2 and H2O using mitochondrial ?-oxidation, the TCA cycle, the mitochondrial electron transport chain and oxida
Nature and Distribution of Viruses Although several infectious diseases of animals and plants had been found to be caused by viruses during early 20 th century, the true natur
Define Factors Affect Management and Prognosis of Root Perforation Time Location of defect in relation of crestal bone Level of perforation Size Periodo
How would you design, in principle, an experiment to test the hypothesis that a certain variety of lettuce seed needed daylight in order to germinate? You would need as large
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