Which plant feature is characteristic?

• A. They move rapidly
• B. They rely on animals for pollination
• C. They have a cell wall
• D. They require external heat for metabolism

Answer: (C)

Plants have a cell wall surrounding their cells. This rigid outer layer, made of cellulose, gives structure and support, helping plants stay upright and protecting their cells. It’s a defining feature that animal cells don’t share, which is why this option stands out as correct. The other statements aren’t universal for all plants: rapid movement isn’t typical for plants; while some plants do interact with animals for pollination, many rely on wind or other methods; and plants don’t require external heat to metabolize—they harness sunlight for energy through photosynthesis, with enzyme activity varying with temperature.