The Relationship Between the Fungi and Algae in Lichens Is

question 37

Multiple Choice

The relationship between the fungi and algae in lichens is best described as

• A)a simple cooperative mutualism between normally free-living strains.
• B)a possible controlled parasitism wherein the fungi withdraw food from the algae and the algae do not benefit from the association.
• C)an endosymbiotic transfer of the chloroplasts of algae to the hyphae cells.
• D)a complete mixing of the genomes of the two groups at the cellular level.
• E)a possible controlled parasitism wherein the algae are moistened and protected by the fungi,but the fungi do not benefit from the association.

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Definitions:

Arrow Pushing

A technique used in organic chemistry to describe the movement of electrons during chemical reactions.

Formal Charges

A bookkeeping tool used in chemistry to account for the distribution of electrons among atoms in a molecule, helping to identify the most stable resonance form.

Nucleophilic Acyl Substitution

A reaction where a nucleophile replaces the leaving group in an acyl compound.

Carbonyl

A functional group consisting of a carbon atom double-bonded to an oxygen atom \(\text{C=O}\).