1) Which of the following controls the activities of a cell?(why)
A Cell Wall
B C ytoplasm
C Cell Membrane
D Nucleus
2)Two identical balls(A and B) fall at the same time.Ball A reaches the
ground at a greater speed .This shows that (WHY)
A Ball A has more potentical energy than ball B before they fall
B Ball A has more chemical energy than ball B before they fall
C Some energy in ball B is converted into heat energy
D More energy is produced in ball A than that in ball B