Word: castee
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Dates: during 1940-1949
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No man likes to fight for a principle which he knows from personal experience is not being put into practice, yet that is exactly the situation which the ordinary soldier or sailor in the United States armed forces faces today. Called on to defend the thesis that "all men are...
How ant colonies draft their soldier armies and maintain balance in their incredible caste systems was cleared up last week by a Chicago zoologist. The secret: a "social hormone" exuded by some of the ants to inhibit the others.
Of all the social insects,* ants are the most highly developed. As many as eleven castes stratify some ant species: even the simplest colonies contain queens, drones, workers, soldiers. The drone caste contains all the colony's few males, whose sole function is sexual. So is the queen'...
The origin of these non-sexual castes has long been debated by entomologists. Some claim they are born of different sorts of eggs. Others claim that all ants are equal when they hatch into the larval state and only during their further development acquire caste with its distinctive form, physiology...
To confirm the last theory Zoologist Robert E. Gregg of the University of Chicago made 33 experiments with 9,537 ants of the species Pheidole morrisi. He arranged for ant larvae to be reared to maturity under the care of soldiers only and of workers only, and found: "Where the...