How do scientists use models to determine the scale properties of objects in our solar system

Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

How can you keep track of variables in a science experiment?

Which of the following is a difference between active transport and facilitated diffusion? view available hint(s)which of the following is a difference between active transport and facilitated diffusion? facilitated diffusion can move solutes against a concentration gradient, and active transport cannot.active transport involves transport proteins, and facilitated diffusion does not.facilitated diffusion involves transport proteins, and active transport does not.active transport requires the expenditure of cellular energy, and facilitated diffusion does not.