If juvenile hormone is absent when a silkworm moults,it will:

Match the following columns and select the correct option.

Column-$I$	Column-$II$
$(a)$ Floating Ribs	$(i)$ Located between second and seventh ribs
$(b)$ Acromion	$(ii)$ Head of the Humerus
$(c)$ Scapula	$(iii)$ Clavicle
$(d)$ Glenoid cavity	$(iv)$ Do not connect with the sternum

$(a) \quad (b) \quad (c) \quad (d)$

$A$ femur is kept in dilute $HCl$ for three days,it becomes

Which of the following is not a function of the skeletal system?

Analogy type questions:
$(1)$ Carpals : $8$ :: Tarsals : ...........
$(2)$ Cartilaginous joints : Between vertebrae of the vertebral column :: Hinge joint : ...........

What is the skeletal system? Explain.