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Life on Earth

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  • Lessons
  • Secondary
  • Biology
  • National 5 (S3/S4)

Ecosystems

What is an Ecosystem? What is a Niche?

What is an Ecosystem? What is a Niche?

Competition in Ecosystems

Competition in Ecosystems

Distribution of Organisms

Biotic and Abiotic Factors

Biotic and Abiotic Factors

Sampling Techniques & Paired - Statement Keys

Sampling Techniques & Paired - Statement Keys

Factors Affecting Biodiversity and Indicator Species

Factors Affecting Biodiversity and Indicator Species

Photosynthesis

Biochemistry of Photosynthesis (light reaction & carbon fixation)

Biochemistry of Photosynthesis (light reaction & carbon fixation)

Limiting Factors of Photosynthesis

Limiting Factors of Photosynthesis

Energy in Ecosystems

Food Chains and Pyramids of Energy

Food Chains and Pyramids of Energy

Food Production

Use of Fertilisers & use of Pesticides

Use of Fertilisers & use of Pesticides

Evolution of Species

Mutations and Production of New Alleles

Mutations and Production of New Alleles

Natural Selection

Natural Selection

Speciation

Speciation

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