The particles in a wave are moving up and down in comparison to the ground. which best describes the wave producing this motion? a. a longitudinal wave moving east b. a longitudinal wave moving south c. a transverse wave moving down d. a transverse wave moving west

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes