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The last geographical area which will be discussed under each time-frame will be the whole of the New World, America. Since this consists of two major continents with an intermediate connecting region, the area will be divided into three subdivisions.

North america

This geographical area is shown on the map-diagram opposite. In the text the historical material will often be further divided into [1] The Far North and Canada and [2]The United States. Since we are interested in a geographical area, not necessarily political boundaries, the first category of "The Far North and Canada", will include Alaska and Greenland, even though the former, of course, is a part of the United States and the latter belongs to Denmark. The second portion will actually be limited to the continental United States. It will be of interest to compare latitudes on this diagram with those of Europe and the Far East. For example, we will be reminded that the British Isles lie at about the same parallel as the southern part of Hudson Bay in Canada and that the center of the United States is on the same latitude as north China and the Tarim Basin in Central Asia. The Bering Strait, the middle of Hudson Bay and the southern tip of Greenland are all on approximately the same latitude as Leningrad in Russia.

North America (This map was obtained from (External Link) and is used with permission under a Creative Commons Attribution 3.0 license .)

Mexico, central america and the caribbean

The map-diagram showing this and the next subdivision is on the second- page ahead. Mexico is shown in violet color, while Central America and the Caribbean islands are in yellow. The Canary and southern equatorial currents, which have been important in the discovery of the New World, are shown. The present political lines in Central America are shown, marking Guatemala, Belize, San Salvador, Honduras, Nicaragua, Costa Rica and Panama, going from northwest to southeast.

South america

On the South American map the rough course of the main rivers and the general extent and location of the cordillera are shown. No attempt has been made to outline the current borders between the various countries, but the general areas of the most important are indicated. In the main body of the manuscript in some time-frames this continent is divided into [1] Western and Northern Coastal Areas and [2]Eastern and Central Areas.

Mexico, Central America, the Caribbean, and South America (This map was obtained from (External Link) and is used with permission under a Creative Commons Attribution 3.0 license .)

    Choose different region

  • Africa
  • Central and Northern Asia
  • Europe
  • The Far East
  • The Indian Subcontinent
  • The Near East
  • Pacific

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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Source:  OpenStax, A comprehensive outline of world history. OpenStax CNX. Nov 30, 2009 Download for free at http://cnx.org/content/col10595/1.3
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