Biology
Deficiency of fluoride leads to Which one of the following health problems?

Stiffening of joints
Tooth caries
Mottling of tooth
Bending of bones

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Biology
Neurospora is used as genetic material because

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

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