Cuales son los gases del efecto invernadero

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

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

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger