Biotic factors include plants, animals, fungi, algae, and bacteria so the only answer would be invasive species
Answer:
List three ways of reducing friction. 1.Polishing the rough surface. 2.Providing all bearings or wheels between the moving parts of a machine or vehicles reduce friction and 3.allow smooth movement as rolling friction is less than sliding friction.
Its Gene recombination during sexual reproduction
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Charged amino acid is the correct answer to this