Medal!
the population of penguins has increased greatly over the past several decades. part of this can be attributed to the over-hunting of baleen whales. develop a logical argument for why these two occurances can be connected.

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

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?

How do the evolutionary chart and the video support the claim that all living things are made up of cells?