Since people are both being born all the time and dying all the time, you can never get a precise figure for the global population at any given moment, however, the world's total population is currently (in the year 2012) approaching seven billion.
Such organisms are said to be multicellular. Human beings fall under that category.
Human beings normally have 46 chromosomes (in the form of 23 pairs).
Microbes enter the body by our eyes ,ears, mouth ,cuts, nose and privet area.
23 pairs or 46 total
Yes, human beings are considered typical organisms as they exhibit characteristics common to living organisms, including the ability to grow, reproduce, respond to stimuli, and maintain homeostasis. Additionally, humans are part of the animal kingdom and share many biological features and functions with other organisms.
Total of two but only one that is not human.
There are almost 4 thousand different species of mammals including human beings.
The concept of human beings as a species has existed for a long time, but no single person can be credited with "discovering" them. The scientific study of human origins and evolution involves contributions from many researchers in various fields such as anthropology, paleontology, and genetics.
Human Beings
two
360 joints
about 60 billion people! well by now a bit more than that------------------------------------------------------------------------That's incorrect if I may put it bluntly.There are currently around 7.000.000.000 (7Billion) human beings living on Earth but I believe that was not his/her question.If you mean how many living beings (as in "living organisms") are estimated to inhabit the earth, including bacteria, then the answer is 3 X 10 to the 33rd power (3,000 quintillion, 3X10^33) and around 75% of that is bacteria.IT--
30,000
Impossible to tell.
That really depends on when you believe the first human being was born. many people believe this was about 10,000 BC, the number you are looking for is around 20 Billion 7 Billion are currently alive now.
Total with estimates: 25 million. For a complete list go to Dwindling in Unbelief. (To get it in proper perspective, how many people have been killed by human beings?)
around 12,000