EasyBiologyHigh School (11–12)Tissues and Organs › Anatomy of Flowering PlantsTissues and Organs › Plant TissuesConceptualA-LevelIB
Name the simple tissue in each case, and say whether its cells are living or dead at maturity…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Name the simple tissue in each case, and say whether its cells are living or dead at maturity.
- The gritty bits in the flesh of a pear.
- A layer under the skin of a young stem, with cell corners thickened by cellulose and pectin.
- The large air-filled spaces in the leaf stalk of a water lily.
- The fibres that are twisted into jute rope.
Need a reminder? The key ideaShow
Parenchyma: living, thin cellulose wall, photosynthesis and storage (chlorenchyma, aerenchyma). Collenchyma: living, corners thickened with cellulose, hemicellulose and pectin, flexible support. Sclerenchyma: dead, thick lignified wall, fibres and sclereids, hard support.
The worked solution
Have you tried it?
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.
Step 1. (a) Gritty bits are sclereids: sclerenchyma, dead.
Step 2. (b) Corners thickened by cellulose and pectin: collenchyma, living.
Step 3. (c) Large air spaces between thin-walled cells: parenchyma, in its form called aerenchyma, living.
Step 4. (d) Fibres: sclerenchyma, dead.
Answer: (a) sclerenchyma, dead; (b) collenchyma, living; (c) parenchyma (aerenchyma), living; (d) sclerenchyma, dead.
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