Questions: Which type of dermal tissue is commonly known as bark?

The answer is the first one: periderm.

Explanation for each option:

• Periderm: This is the correct answer. The periderm is a type of dermal tissue that forms the outer protective layer of woody plants, commonly known as bark. It replaces the epidermis in mature plants and consists of the phellem (cork), phellogen (cork cambium), and phelloderm.

• Cuticle: This is incorrect. The cuticle is a waxy layer that covers the epidermis of leaves and stems, providing a protective barrier against water loss and pathogens. It is not referred to as bark.

• Epidermis: This is incorrect. The epidermis is the outermost layer of cells in young plants and non-woody parts of plants. It is replaced by the periderm in mature woody plants and is not considered bark.

In summary, the periderm is the type of dermal tissue commonly known as bark.