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Multiple Choice

Which is true about centipedes (Class Chilopoda)?

The number of legs per body segment is the defining feature here. Centipedes have one pair of legs on each body segment, which gives them a long, slender, and fast-moving form suited to predatory life. This single-leg-per-segment pattern is what sets centipedes apart from millipedes, which have two pairs of legs per segment. They do not breathe through gills; their respiration relies on a tracheal system with spiracles (air openings) that deliver oxygen directly to tissues. Also, centipedes do not have a fixed total of four legs; the total number varies widely among species, often many dozens or more. So, the statement that matches the biology best is that centipedes have one pair of legs per body segment.

The number of legs per body segment is the defining feature here. Centipedes have one pair of legs on each body segment, which gives them a long, slender, and fast-moving form suited to predatory life. This single-leg-per-segment pattern is what sets centipedes apart from millipedes, which have two pairs of legs per segment.

They do not breathe through gills; their respiration relies on a tracheal system with spiracles (air openings) that deliver oxygen directly to tissues.

Also, centipedes do not have a fixed total of four legs; the total number varies widely among species, often many dozens or more.

So, the statement that matches the biology best is that centipedes have one pair of legs per body segment.