The optical microscope is regularly used to identify pathogenic microbes. in 1918 the spanish flu infected almost one third of the world and was thought to be caused by bacteria. however, a virulent virus was the cause of the spanish flu. from what we have learned throughout this lab on microscopy, why weren’t scientists able to identify the spanish flu with an optical microscope?

Scientists could not identify the virus because it was too small to be seen by an optical microscope.

When the Spanish flu ravaged the world, scientists were unable to find out what caused it for a long time because:

For this reason, scientists could not properly identify the cause of the Spanish flu which meant that they could not devise means to combat it.

In conclusion however, scientists could not see the virus on an optical microscope because it was too small.

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answer 2 is the right one. jim should measure his snack to make sure he is using the right serving size.

answer

ben’s food poisoning was caused by cross-contamination

explanation

cross-contamination in food occurs when harmful bacteria is transferred to food from other foods, utensils or cutting boards. it happens often when handling raw meat , sea foods and poultry. in this case, because ben did not wash hands before and after handing the poultry, chances that bacteria transfer   from the poultry to the vegetable are high.