Answer: a cell wall
Explanation: a cell wall is a barrier that protects the plant cell. Animal cells do not need this becuase they have a cell membrane which also protects the cell.
Answer:
B. Protect us from harmful ultraviolet Radiation.
Explanation:
I did this in 6th grade. The ozone layer contains a high concentration of ozone, which absorbs most of the ultraviolet radiation reaching the earth from the sun.
Answer:
i think carbon dioxide
Explanation: because it needs that to make sugar to survive
Answer:
Catalase is an enzyme in the liver that breaks down harmful hydrogen peroxide into oxygen and water. When this reaction occurs, oxygen gas bubbles escape and create foam.
Answer:
limbs form the baby has fingers, hands,arms, feet and toes. they can now open and close their fists and mouth
