Multiple choice

Areolas are pieces of lichens separated by cracks. Which lichen leads to the formation of areolas?

  1. Fruticose lichen

  2. Crustose lichen

  3. Byssoid lichen

  4. Foliose lichen

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When a crustose lichen gets old, the centre may start to crack up like old-dried paint. This is called being rimose or areolate, and the island pieces separated by the cracks are called areolas.