The role of extensor muscles,absent in the leg joints of many spiders,has been replaced by
A)fluid movements and pressure changes of the hydrostatic skeleton.
B)strategically placed exoskeletal plates that store elastic energy when deformed.
C)a system of chitinous self-locking and unlocking catches and levers.
D)a system of autonomously controlled valves within the legs.

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The Answer of The role of extensor muscles,absent in the leg joints of many spiders,has been replaced by
A)fluid movements and pressure changes of the hydrostatic skeleton.
B)strategically placed exoskeletal plates that store elastic energy when deformed.
C)a system of chitinous self-locking and unlocking catches and levers.
D)a system of autonomously controlled valves within the legs.

The Role of Extensor Muscles,absent in the Leg Joints of Many