Answer to Question #67241 in Zoology for Aliza Khan
There are 3 theories on origin of middle lamella;
- It originally has been a common matrix in which the cells were imbedded;
- Middle lamella is the original cell wall, laid down in common by the 2 daughter cells during cell division, and remaining distinct from the secondary thickening layers;
- Middle lamella is excreted by the daughter cells into a space left between them after their formation.
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