Answer:
the phosphorous atom has 16 electrons
Answer:
A is the answer i had same answer
D) Mitochondria because muscle cells require more ATP (energy).
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.