CAMPBELL BIOLOGY (LL)-W/MOD.MASTERING.
CAMPBELL BIOLOGY (LL)-W/MOD.MASTERING.
11th Edition
ISBN: 9780134819822
Author: Urry
Publisher: PEARSON
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Chapter 31.1, Problem 2CC
Summary Introduction

To determine: Evolution of a fungus from parasitic to mutualist and its effects on the host individual.

Concept introduction: A trait or character is a feature of an organism. Triats like ancestral traits are what the modern generation has derived from ancestor. A derived trait is a trait that the current organism has, and previous one didn't or they have undergone a secondary loss (this may also refer to structures that are not present in an organism, but were present in its ancestors). Lack of structure is a derived trait saprobes, symbionts, or parasites. The ancestor of the mutualist fungi adopted parasitic mode of nutrition that causes the death of the host. The progeny of the parasitic fungi adopted the evolutionary changes in their mode of nutrition (mutations) and hence followed the mutualism (symbiotic relationship) that would not harm the host but also benefit both host and the fungi.

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