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(a) Adult worker bee collecting pollen, the white arrow indicates corbicula filled with pollen granules. (b) Effects of Ubx-RNAi on adult worker T3 leg morphology. The white arrow points to the central bristle in wild-type tibia, while white arrowheads point to ectopic bristles in the moderate phenotype. The pollen press on T3 basitarsus is indicated by a black arrowhead in worker bees, while the asterisk denotes the absence of this structure in queens. (Online version in colour.)
