Cell walls are supporting structures that help the plant to have a fixed shape and protect it from injury. Other than that, it helps to keep the plant turgid so that it can stay firm and upright. Because when it enters a high water potential solution, as water moves in, the water exerts turgor pressure on the cell wall and the cell wall thus exerts an opposing pressure to keep water out. Hence cell wall is needed for the plant.
On the other hand, animal cells do not need to keep the structures, as they have the skeletal system to protect the organs and cushion them against any
external injuries.
I hope that helped
B, because as energy is move up form the phyramid, energy is lost.
D) laboratory experiments because every experiment needs a control and a variable.
The correct answer is: Miami, Florida.
Polaris (other names are North Star or Pole Star) is one of the brightest, multiple star in the constellation of Ursa Minor. Because it is located nearly at the north celestial pole, it seems that the entire northern sky moves around it.
