Question
Blastula and Gastrula
OR
Give two differences between blastula and gastrula.
✓
Answer
| Blastula | Gastrula |
| 1. Blastula is formed from morula on 7th day after fertilization. | 1. Gastrula is formed from blastula 15 days after fertilization. |
| 2. Blastula has a blastocoel. | 2. Gastrula has a gastrocoel or archenteron. |
| 3. Blastula is produced by the process of blastulation. | 3. Gastrula is produced by the process of gastrulation. |
| 4. Blastula undergoes implantation followed by gastrulation. | 4. Gastrula undergoes morphogenesis and then forms germs layers. |
| 5. During blastula formation there is no movement of cells. | 5. Gastrula formation results from the morphogenetic movement of cells. |
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