Q6 - Missing Cell Types in Adults

Theoretical 2 Real exam question - full text reproduced under IBO's CC BY-NC-SA 4.0 license

Cell Theory, Prokaryotes & Eukaryotes

Adult humans lack some cell types possessed by children/embryos.

True or False?

Q6.1. Brown adipocytes (necessary for non-shivering thermogenesis) are fully missing in mature adult humans.

Q6.2. Ameloblasts (responsible for the formation of the enamel) are fully missing in mature adult humans.

Q6.3. Neuronal stem cells in the central nervous system are fully missing in mature adult humans.

Q6.4. Totipotent stem cells are fully missing in mature adult humans.

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Question reproduced from IBO 2023, Theoretical Paper 2, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF