the cell theory explains & states this
Answer:
the branch of science concerned with classification, especially of organisms; systematics.
Explanation:
Alveoli are found in lungs and exchamge O2 and Co2 !!
so answer is last one !!
1. Intensity.
2. Duration of shaking.
3. Nature of material upon which structure rests.
4. Nature of building materials and the construction practices of region.
c. cell wall, vacuole
Among the choices above, the two features that indicate that a cell is a plant cell is the cell wall and vacuole. The cell wall can only be found in plant cells. It is the rigid cell that surrounds the cell membrane. The vacuole of a plant cell and animal cell are way too different. The vacuole of an animal cell is usually more than one and small, even smaller that that of the plant cell. On the other hand, the vacuole of the plant cell is only one in fact a large one that takes up almost 90 percent of the volume of the cell
