Chapter 31, Problem 6TYU

Summary Introduction

To write: To test the given hypothesis.

Concept introduction: Lichen refers to symbiotic association formed between a fungus and an alga or a cyanobacterium. Its growth is seen in various forms on the surfaces of rotting logs, trees, rocks, and roofs.

Given: Two hypotheses are proposed for lichen growth forms:

1. a) Hypothesis 1: “Crustose, foliose, and fruticose lichens, of which each represent a monophyletic group”
2. b) Hypothesis 2:“Each lichen growth form represents convergent evolution by taxonomically diverse fungi”