Which of the following sets of characters are applicable in the metamorphosis of the tadpole larva of frogs and toads?

Locomotion requires a perfectly coordinated activity of:

Fill in the blank spaces:
$(a)$ All mammals (except a few) have ............. cervical vertebra.
$(b)$ The number of phalanges in each limb of human is ............. .
$(c)$ Thin filament of myofibril contains $2 \,'F'$ actins and two other proteins namely .............. and ........... .
$(d)$ In a muscle fibre $Ca^{++}$ is stored in ............. .
$(e)$ .............. and .............. pairs of ribs are called floating ribs.
$(f)$ The human cranium is made of .............. bones.

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

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

Bones act as a reservoir of which mineral salts?

While at ease,some monkeys spend their time searching for something in each other's fur,which they then eat. What are they actually searching for?