Compare parenchyma, collenchyma and sclerenchyma.
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Compare parenchyma, collenchyma and sclerenchyma. For each, say whether the cells are alive or dead, what the cell wall is like, and one job.
Need a reminder? The key ideaShow
Parenchyma: alive, thin walls, stores food. Collenchyma: alive, thick at the corners, flexible. Sclerenchyma: dead, lignin, hard. Epidermis protects and has stomata; cork is dead and waterproof.
The worked solution
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Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Parenchyma. Alive; thin walls; stores food and fills space.
Collenchyma. Alive; walls thick at the corners; lets the plant bend without breaking.
Sclerenchyma. Dead; very thick walls with lignin; gives hardness and strength.
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