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Questions  

During a microbial study, a spore was observed which is thick walled, highly resistant and gets surrounded by different layers. These can withstand temperature as high as 100ºC or as low as -100ºC, so they can remain unharmed during pasteurization. From these characters we can predict that the spore must be

a
zoospores
b
endospore
c
auxospore
d
conidia

detailed solution

Correct option is B

During a microbial study, a spore was observed which is thick walled, highly resistant and gets surrounded by different layers. These can withstand temperature as high as 100ºC or as low as -100ºC, so they can remain unharmed during pasteurization. The spore is an endospore which has many layers like the spore coat, exosporium, cortex.

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