Which has been observed in the study of embryology? species whose embryos have similar traits rarely have a common ancestor. species whose embryos have similar traits always have similar body forms as adults. all traits present in early embryos remain throughout development. some traits in certain embryos disappear as the embryo develops

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

Drag each label to the correct location on the table. each label can be used more than once. decide whether each statement describes saturated fat, unsaturated fat, or both saturated and unsaturated fats.

What is the difference between an igneous, sedimentary and metamorphic rock