What powers explosions and fire

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

Why does asexual reproduction result in offspring with identicle genetic variation

Why is the bottom layer of a trophic pyrimid the