But now, no sooner was the wax-cluster in position than the workers below broke out again.
But we're hatching out drones with workers' stomachs; workers with drones' stomachs; and albinoes and mixed-leggers who can't pack pollen--like that poor little beast yonder.
He proved that the old six-sided cell was solely due to the workers building against each other on opposite sides of the wall, and that if there were no interference, there would be no angles.
Suppose now, we sound workers tried to raise a Princess in some clean corner?
Thus in Eciton, there are working and soldier neuters, with jaws and instincts extraordinarily different: in Cryptocerus, the workers of one caste alone carry a wonderful sort of shield on their heads, the use of which is quite unknown: in the Mexican Myrmecocystus, the workers of one caste never leave the nest; they are fed by the workers of another caste, and they have an enormously developed abdomen which secretes a sort of honey, supplying the place of that excreted by the aphides, or the domestic cattle as they may be called, which our European ants guard or imprison.
It often happens that the larger or the smaller sized workers are the most numerous; or that both large and small are numerous, with those of an intermediate size scanty in numbers.
But the important fact for us is, that though the workers can be grouped into castes of different sizes, yet they graduate insensibly into each other, as does the widely-different structure of their jaws.
With these facts before me, I believe that natural selection, by acting on the fertile parents, could form a species which should regularly produce neuters, either all of large size with one form of jaw, or all of small size with jaws having a widely different structure; or lastly, and this is our climax of difficulty, one set of workers of one size and structure, and simultaneously another set of workers of a different size and structure;--a graduated series having been first formed, as in the case of the driver ant, and then the extreme forms, from being the most useful to the community, having been produced in greater and greater numbers through the natural selection of the parents which generated them; until none with an intermediate structure were produced.
Thus, as I believe, the wonderful fact of two distinctly defined castes of sterile workers existing in the same nest, both widely different from each other and from their parents, has originated.
Coverage may also be denied in situations involving self-inflicted injuries (including those caused by a person who starts a fight), injuries suffered while a worker
was committing a serious crime, injuries suffered while an employee was not on the job, and injuries suffered when an employee's conduct violated company policy.
Jobs that place heavy demands on the worker
and over which workers
have little control (common among low-status workers
and women) increase the risk of conditions such as coronary heart disease (Australian Institute of Health and Welfare, 1999; Syme & Balfour, 1997).