The structure that surround and protect the cell depends on the cell type: for plants cells it would be a cell wall whereas for an animal cell it would be the cell membrane :)
Answer:
a.) kinetic energy from the mallet is transferred first to the orange ball and then to the purple ball.
Explanation:
It is not mechanical like in B, potential energy is not passed from ball to ball like in C, and it is not electromagnetic like in D. Therefore, it is A because the mallet hits(kinetic) the orange ball then the orange ball rolls(kinetic) into the purple ball so that the purple ball rolls(kinetic)
Aids is one of the disease that damage little by little the immune system until the human body die.
There are approximately 4.7 to 5.5 liters and 1.2 to 1.5 gallons of blood in a human's body.
