90) one one thousandth (1/1000) of a meter A) 1m B) 1 cm C) 1mm (i think C is th
ID: 99234 • Letter: 9
Question
90) one one thousandth (1/1000) of a meter
A) 1m
B) 1 cm
C) 1mm (i think C is the answer)
D) 1 um
E) 1nm
91) one one billionth of a meter is:
A) 1 m (i think A is the answer)
B) 1 cm
C) 1mm
D) 1 um
E) 1 nm
92) A light microscope is required to see things starting at what size diameter:
A) 10 mm
B) 1 mm
C) 100 um
D) 10 um
E) 1 nm
94) Which of the following are not associated with infection?
A) Fungus
B) bacteria
C) protozoa
D) algae
E) viruses
97) The first evidence of the designed use of micro-organisms was found in _____ in the ______.
A) france / production of cheeses
B) england / production of antibiotics
C) egypt / production of beer
D) USA / field of biotechnology
E) Asia / production of vaccines
Explanation / Answer
90) C) 1mm is one thousandth (1/1000) of a meter.
91) E) 1 nm is one billionth of a meter.Nanometer is equal to one billionth of a metre (0.000000001 m).
92) B) 1 mm.A light microscope is required to see things starting at 1mm size diameter.Light microscopes let us look at objects as long as a millimetre (10-3 m) and as small as 0.2 micrometres, whereas the most powerful electron microscopes permit us to see objects as small as an atom about one ten-millionth of a millimetre or 10-10 m.
94) D) algae are not associated with infection.They are photosynthetic organisms and provide most of the oxygen on Earth.Fungus show infections which cause of skin disease. Many human illnesses are caused by infection with either bacteria or viruses.Infections due to a virus, like the common cold and flu.Protozoan infections are parasitic diseases caused by protozoans.They include organisms Amoebozoa, Excavata, and Chromalveolata.
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