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Two rounded chambers join in this yeast cell model, showing a budding cell forming an ascus spore sac. The lower cell is cut open to reveal a nucleus, mitochondria, folded membranes and scattered granules, while the upper sac holds four plump ascospores packed tightly together inside a thick cell wall. Clear and well organized, it gives a cell biology or microbiology class an easy way to explain fungal reproduction, and it adds a curious specimen to a science display shelf.

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