Question

1. How can the age of a tree be estimated from the analysis of the rings present on a cross section of its trunk?
2. How does the cork act as a protective tissue?

Answer in a large paragraph

Answer 1

1.) Each year, trees add on extra layer to their trunks.

Each ring corresponds to roughly one year.

We can obtain the age by literally counting the number of rings in the trunk.

2.) It has dead cells that are compactly arranges without intermolecular spaces.

It has deposition of sub Erin on walls making them impervious to gases and water.

Answer 2

1) in each year, trees add an extra layer of bark onto the stem. When we cut the stem horizontally, we can clearly see the various layers in the surface of it. By counting the number of layers, we can say about the age of the tree.

2) cork consists of dead cells which acts as a protective tissue to protect the stem of the tree. Thus the the cork act as a protective tissue.