Biology
Ozone hole refers to

decrease in the ozone layer in troposphere
increase in the thickness of ozone layer in troposphere
decrease in thickness of ozone layer in stratosphere
hole in ozone layer

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Biology
Neurospora is used as genetic material because

the product of single meiosis can be easily analysed
meiotic products are linearly arranged in the form of ordered tetrads
it has short life cycle of 10 days
is a diploid fungus

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