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Niches, adaptation and natural selection
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Habitat, niche, and the shape of a species' role

Habitat, niche, and the shape of a species' role

Ecological niche diagram showing a squirrel in woodland, with abiotic and biotic factors and a smaller realised niche inside a larger fundamental niche

A habitat is the place where an organism lives, such as woodland, pond, or rocky shore. An ecological niche is broader: it includes the resources used, the conditions tolerated, and interactions with other organisms.

Niches, adaptation and natural selection Lesson

  1. A Level
  2. /Biology
  3. /Niches, adaptation and natural selection

Step-by-step lessons on Edexcel A A Level Biology Niches, adaptation and natural selection. Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.