It was proposed by a scientist named Charles Darwin.
Answer:COmpound names. Sorry I couldnt help with all. good luck!
Explanation:
LiF-Lithium flouride
BeO-BerylliumOxide
CaCl_2-Calcium Chloride
AlF_2-Difluoroaluminum
CaO-Oxacalcium
MgS-Magnesium sulfate
K_2O-Potassium Oxide
BaCl_2- Barium Chlroide
The answer is B because:
Cell walls are made of cellulose and proteins (hence II).
Animal cells don't have cell walls (only cell membrane) but plant cells do so IV
They must be semipermeable since materials for example carbon dioxide and water for photosynthesis have to go into the cell <em>some</em> way.