BiologyWise
Biology Wise: Competitive Exclusion Principle
The concept of competitive exclusion, explained here, states that two species cannot co-exist when needing the same, limited resources to survive. The different types are described and examples are provided.
Science Struck
Science Struck: Limiting Factors in the Desert Ecosystem
Describes conditions in a desert that limit how large populations of species can grow.
PBS
Pbs Learning Media: Coral Reef Connections
Dive in and explore what makes this beautiful world so fragile. In this Web feature, from the PBS series "Evolution," discover how coevolution has shaped the ecological relationships among reef creatures.
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