高中英语unit3inventorsandinventions课件新人教版选修8内容摘要:

t one day guarding the nest,progressing to other tasks as they get older. The new research shows that Jata237。 guards, unlike their honeybee counterparts, are physically specialized to perform a particular task. Having largerbodied guards is important for nestdefense, as they39。 re better at fighting one of Jata237。 39。 s main enemies—the robber bee Lestrimelitta limao, which can kill off many colonies when attacking nests for food. Even though the Jata237。 guard lacks a sting and is eventually killed, it can knock its head onto the wing of a robber bee,preventing it from flying. Largebodied soldier workers have long been known in ants and whit。
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