Why is a bone like the scapula (shoulder blade) considered part of the appendicular skeleton and not the axial skeleton?

Which plant has a visible leaf modification that will it conserve water in extremely dry environments?

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic