Rigor Mortis was first noticed in

$A$: On repeated application of stimuli,involuntary striped muscles undergo fatigue.
$R$: This is due to non-availability of $ATP$ molecules.

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

Analogy type questions:
$(1)$ During muscle contraction,the $A$-band does not change in length.
$(2)$ The $8^{th}$,$9^{th}$,and $10^{th}$ pairs of ribs are attached to the $7^{th}$ pair of ribs with the help of hyaline cartilage. Identify the terms.

Write the difference between (Any two):
$(a)$ Actin and Myosin
$(b)$ Red and White muscle fibres
$(c)$ Pectoral and Pelvic girdle

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