📚 Part 1: Multiple Choice Questions

✏️ Part 2: Fill in the Gaps

Word Bank: diffusion, multicellular, surface area, volume, exchange surfaces, transport systems

Single-celled organisms can rely on simple _____________ to move substances in and out of the cell. However, _____________ organisms need specialised _____________ and _____________ because they have a small _____________ to _____________ ratio.

Substances transported INTO organisms: _____________, water, dissolved food molecules, and _____________.

Substances transported OUT OF organisms: _____________ and _____________.

📝 Part 3: Short Answer Questions