Students placed their eggs in vinegar, a mild acid. the egg shells disappeared overnight. based on the passages description of what happened, we could infer that this is a reaction. a) chemical b) physical c) dissolving eliminate d) phase change

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

What does the positioning of transcription factors determine?

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from