The gallmaking fly larvae feeds on goldenrod plants, causing the plant tissue to produce a growth deformity called a gall. How does parasitism of small galls by wasps and predation of fly larvae in large galls by birds result in a higher percentage of medium-sized galls?

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The Answer of The gallmaking fly larvae feeds on goldenrod plants, causing the plant tissue to produce a growth deformity called a gall. How does parasitism of small galls by wasps and predation of fly larvae in large galls by birds result in a higher percentage of medium-sized galls?

The Gallmaking Fly Larvae Feeds on Goldenrod Plants, Causing the Plant