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Biology
Organisms and Populations
90 questions from 35 papers, each with its answer.
- 90 questions
- 35 papers
- 2.55% of Biology
Population Interactions
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A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is:The sea anemone benefits (it is carried to new feeding sites) while the hermit crab is neither harmed nor benefited, so this is treated as commensalism.
Population growth
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A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is:Net increase = (natality + immigration) − (mortality + emigration) = (250 + 20) − (240 + 30) = 0
That is every question in Organisms and Populations for this filter.
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