Tag Archives | biological

Complete information on chemical and biological warfare disasters

The threat of chemical and biological warfare has been talked about frequently in the past years but the likelihood of such occurrence has assumed serious concern in the emerging terrorism dominated environment. Such tactics have been rightly given the name of Weapons of Mass Destruction (WMD).

What is Biological Oxygen Demand (BOD) ?

Aerobic bacteria use oxygen dissolved in water when breaking down wastes. Scientists can find out how much organic matter the waste water contains by measuring how much oxygen the aerobic bacteria use in breaking it down.

What is the biological reason for the birth of identical twins ?

Generally, a fertilized ovum (zygote) develops in to a single individual. But, occasionally, at the time of cleavage of a zygote, the two cells are separated, each producing an individual. Both the individuals are produced at one birth.

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