Which of the following are guidelines to follow for obtaining accurate observations? a. taking careful measurements b. using vague, boring language c. making careful sketches d. making up data to fill in gaps

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 bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

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