Which layer is present under the skin?

Which among the following is not a characteristic of yellow fibers of connective tissue?

Blubber of whale is an example of

Ligaments are primarily composed of which protein?

Mast cell is a cell of $A$ of vertebrate animals. Mast cells mediate inflammatory responses such as $B$. Mast cells store a number of different chemical mediators including $C$ and $D$. Here $A$ to $D$ refers to:

Identify figures-$I$ and $II$.