Which conclusion about paradoxides pinus is supported
life forms existed during the cambrian period.
similar fossil species formed after the devonian period.
this fossil species first appeared during the cenozoic era.
different life forms were surviving during precambrian time.

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.