The answer to your question is B.
Answer:
Explanation:
A boundary that distinguishes inside from outside the cell yet allows materials to enter or leave the cell.
The cell needs a barrier for protection, rigidity and also for easy transportation.
Answer:
lithosphere
Explanation:
Earth's lithosphere includes the crust and the uppermost mantle, which constitute the hard and rigid outer layer of the Earth. The lithosphere is subdivided into tectonic plates. Further there are two types of lithosphere mainly as oceanic and continental lithosphere.
Suoerior and inferior vena cava → heart → Right chambers → lungs
→ left chambers → aorta