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Category: Biology
Figure 17.9 shows a stingless fly that mimics a stinging wasp. Researchers have found that in such mimicry systems, mimics benefit most when they are rare relative to the well-protected model. Can you explain why?
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Category: Biology
Ectotherms such as invertebrates, fish, and amphibians convert more of the energy in the food they eat into body tissues than do endotherms such as birds and mammals. What allows ectotherms to make more efficient use of food energy?
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Category: Biology
Which species of Paramecium was the superior competitor?
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Category: Biology
With antibiotic resistance increasing (Section 12.1), researchers are looking for ways to reduce use of these drugs. Some cattle once fed antibiotic-laced food now receive food containing harmless bacteria that can live in the animal's gut. The idea is that if these bacteria are in place, then harmful bacteria with the same resource needs are less ...
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Category: Biology
Consider the shape of the two age structure diagrams to the right. Which population will grow the fastest? Which includes the greater proportion of older people?
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