Which applies to the collision theory?
a. particles need to collide in order to react.
b. particles may obtain successful collisions in any molecular orientation.
c. temperature increase causes kinetic energy of particles to decrease.
d. reactions do not have to begin with collision of molecules or particles.?

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?

The earths core is made up mainly of what 2 substances? 2. like an egg, earth has a core, a layer surrounding the core, and a thin, hard outer layer. which layers of the earth match the layers of an egg?