The table describes four structures found in a mammal.
Table: Descriptions of four structures found in a mammal
| Structure | Description |
|---|---|
| W | A group of cells that have the same structure and all release enzymes |
| X | Several different tissues working together to filter the blood |
| Y | A single specialised cell that carries oxygen around in the blood |
| Z | A group of organs that work together to move the body around |
Which structure is an organ?
W
X
Y
Z
19 exam-style questions on AQA GCSE Biology 2.1 Principles of organisation, covering 2.1 Principles of organisation. Each one has a worked solution and a mark scheme showing where the marks go.