When nutrients, water, and materials cross a cell membrane without requiring energy from the cell, the process is called A: Active Transport
B: homeostasis
C: Selective Permeability
D: Diffusion

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

Which best describes how johannes kepler developed his laws of planetary motion

How are isotopes of the same chemical element alike? how are they different?