Biology
The subcellular organelle not bound by a single membrane is

Golgi apparatus
Mitochondria
Lysosomes
Endoplasmic Reticulum

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Biology
Neurospora is used as genetic material because

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

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