If an organism's body fluids are isotonic to that of the ocean.

Which of the following best describes the economy of africa?

The 5th term in a series of even number that begin 3x

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.