The mass of fibrocartilage that fills the gap between two ends of a broken bone in the early stages of healing is called

Fibrocartilaginous callus

Explanation:

The fractured bone starts healing itself and this helps in joining of the fractured bones. The temporary structure that starts forming is know as fibrocartilage, which is a temporary formation of the fibroblast and the chondroblast which forms when the fractured bones try to heal itself.

This healing process is slow in adults as compared to that of children.This formation can be seen in the X-ray, usually after three week of the fracture.

tissue

explanation:

it is actually formed by geoup of cells which is tissue

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.