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Several Species of Grain Beetles Can Live on Dry Meal,obtaining

Question 53

Multiple Choice

Several species of grain beetles can live on dry meal,obtaining water mostly as metabolic water.Many of these beetle species are grain pests that do considerable damage to stored grain.You set up a dozen jars of dry meal and introduce 50 individuals of each species to each jar,being careful to have half of each species from each sex.The food supply is sufficient to last for a year and the size is adequate so that wastes do not become toxic.Most likely,examination of the jars in six months will find


A) a totally random variation in numbers of both beetles.
B) only one species per jar,similar to the classic competitive exclusion principle experiment with paramecia.
C) the same ratio of beetles as when you started,about half from each species.
D) only dead beetles in all jars due to intense competition for the niche.
E) half the jars with more of one species and the other half of the jars will have more of a second species of beetle.

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