When a crayfish is not walking how does water move over the gills

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

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

What is the role of the phospholipid belayer in cellular transport in living cells