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Reproduction in Lower and Higher Animals — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYReproduction in Lower and Higher Animals4 Marks
Question
Distinguish between: Blastula and Gastrula ### Give two differences between blastula and gastrula.
✓

Answer

BlastulaGastrula
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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