Scientists collect two samples of stem cells from horses. One sample comes from an early embryo and the other comes from the bone marrow of a fully developed horse. The sample labels are lost.
The scientists record the specialised cell types produced by each sample.
| Sample | Red blood cells produced | White blood cells produced | Nerve cells produced |
|---|---|---|---|
| A | Yes | Yes | Yes |
| B | Yes | Yes | No |
Explain which sample came from the early embryo.
194 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.