Energy transfer (Edexcel GCSE Biology): Flashcards

Position an organism occupies in a food chain

Only ~10% of energy passed to next trophic level

As heat to the environment

In waste products (urine, faeces)

Bones, roots, fur

Less energy available as you move up food chain

4-5 levels

Not enough energy left to support more organisms

From sun via photosynthesis

Bones, hooves, claws

Waste from excess proteins, excreted in urine

$\frac{\text{Biomass transferred}}{\text{Biomass available}} \times 100$

Direction of energy transfer