In an experiment, a cell was isolated from an unknown embryo at four-cell stage and allowed to divide. Even after repeated divisions, this isolated cell did not develop into a complete animal.The embryo used in the above experiment could be of a:
Correct answer: C. Starfish
- A. Frog
- B. Snail
- C. Starfish
- D. Sparrow
Explanation
The correct answer is starfish. In starfish, the embryo exhibits a mosaic development pattern. This means that the fate of each cell is determined early, and if a cell is isolated, it cannot develop into a complete organism. In contrast, embryos of organisms like frogs, snails, and sparrows have regulative development, where cells have the potential to form a complete organism if separated at an early stage. Therefore, the inability of the isolated cell to form a complete animal suggests that the embryo is from a starfish.
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