A technician takes four tissue samples from an aquatic plant growing at the edge of a pond.
| Sample | Source of tissue |
|---|---|
| W | A leaf floating on the surface in daylight |
| X | The outside of a stem under clear water that receives daylight |
| Y | A root buried in mud, where no light reaches it |
| Z | The outside of a stem above the water in daylight |
The technician needs cells that do not contain chloroplasts.
Which sample should the technician choose?
Sample W
Sample X
Sample Y
Sample Z
282 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.