page 06 8. Goldenrod gall flies (Eurosta solidaginis) lay eggs on the stems of several plant species. The newly hatched larvae then burrow into the plant, causing the growth of a mass of plant tissue (gall) around them. The larvae live and feed inside the gall. The size of gall is affected by two different selection pressures. Larvae in smaller galls are more likely to be predated by wasps, while larvae in larger galls are more likely to be predated by birds. Which diagram represents the type of selection affecting gall size? B gall size gall size gall size gall size D C A population after selection number of galls number of galls number of galls number of galls original population Key