Definitely smoking. That’s the prime cause of lung cancer.
Primary succession starts with bare rock which is broken down by either lichen or moss to make soil while secondary succession starts with developed soil
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Hope the above picture might help you :)
67 million years ago in the form of phyollths (small sllica flecks in grass that make it difficult to digest)
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Sperm is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction. : )
