A scientist examined cells from the same type of tissue in chicken embryos at three stages of development.
| Age of embryo / days | Cells that had specialised / % |
|---|---|
| 4 | 19 |
| 10 | 54 |
| 16 | 81 |
What conclusion is justified by the data?
Cells in this tissue specialised faster in older embryos than in younger ones.
The proportion of specialised cells increased as the chicken embryo developed.
The specialised cells in this tissue could still change into other cell types.
The tissue cells stopped dividing when the chicken embryo reached day 10.
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.