Question

Arachnids are stored in alocohol, while insects are pinned under glass. Why do you think this is the case?

Answer 1

The archanids are preserved in 70% ethyl alcohol because they have a hard body and it helps in keeping the body free from damage or getting rotten. It does not let the arachnid decay as without that it has the tendency to decay beneath the hard shell or covering.

The insects are pinned through the center of the thorax and their wings extended. They are even kept in a jar with naphthalene. The insects are pinned so that it becomes easy to study and identify various parts and identify its symmetry