Biology · Unit 2
Biology Unit 2: Populations
6 topics · Start with Niches and Tolerance Ranges
Unit 2 looks at populations, the groups of one species living in the same place. You will explain where a species can live, see how scientists estimate how many individuals there are, and follow how populations grow and what limits them. You will also compare how species reproduce and how living in a group affects survival.
Study Tips for Unit 2
- A species can live in a place only if each abiotic factor there is inside its tolerance range. When you explain where a species lives, name the factor and give the range.
- Population sizes are usually estimated from samples, not counted one by one, so always say what was sampled and how the estimate was made.
- For data questions, quote numbers from the graph or table as your evidence, include units, and then explain what the data show using claim, evidence, and reasoning.
Unit 2 Study Guide
A 6-page review of all 6 topics, with space to show your work. Try it on your own first, then check your answers with the key.
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