Question

61. In vertebrates locomotion takes place by:
1) Movement of limbs
2Force
generated by muscle
contraction which is utilized for
moving bones like levers.
3) Muscle contraction
4) Contraction of fibres at joints of bones
دن
why is the answer 2) and not 1)​

Answer 1

The Axial and Appendicular Skeletons | Bone Tissue | Bone Growth. Joints | Skeletal Muscle Systems | Contraction of Nonmuscular Cells ... Internal pressures generated by muscle contractions cause movement as well as maintain the shape ... can elongate or contract its body by contracting one or the other set of muscles.

Answer 2

I think the answer is 2 :force