Question

Give biological/technical term of the following.

1. Permanently open structures seen on the bark of an old woody stem.

Answer 1

Lenticels.

1. Lenticels are found in the bark of plants' old woody stems.
2. Lenticels allow gases to pass between the outside world and the internal tissue spaces of the organs.

3. They let oxygen in while expelling carbon dioxide and water vapor at the same time.