What is the purpose of the structure of a spirillum?

The purpose of the structure of a spirillum is to obtain more flexibility, which will facilitate its movement.

Explanation:

Spirillum bacteria are a phylum, the Spirochaetes. And its name is probably because of the spiral shape its body structure has. Due to this body structure, these bacteria have greater flexibility and can move with greater ease and agility. The movement they perform is circulatory wave (usually around the body itself).

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

i believe it is c: genes for body color and wing size are inherited separately from each parent.