2.  Most arachnids
have hard outer shells called exoskeletons
have moist, smooth skin without scales
have dry, rough, scaly skin

3.  Most arachnids
give birth to live young
give birth to live young in pouches
give birth to young hatched from eggs

4.  Most arachnids
breathe through lungs inside their bodies
breathe through holes in the sides of their bodies
breathe through gills in the sides of their bodies

5.  Arachnids
have four legs (two pair)
have six legs (three pair)
have eight legs (four pair)

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