25.1
Food chains and webs
Producers and consumers, reading the arrows, food webs, and the decomposers that recycle what dies.
25.2
Interdependence
Habitats and populations, how a change spreads through a food web, predator and prey cycles, and competition.
25.3
Pollination and food security
How insects carry pollen, from flower to fruit, insect or wind, the crops that need pollinators, and keeping our food secure.
25.4
Toxins and sampling
Poisons that build up along food chains, how living things change their environment and are changed by it, and counting with quadrats.
Daily 5
Five quick diagram questions a day from this unit. The ones you get wrong come back sooner. Progress saves in this browser.
What this unit covers
Mapped to the KS3 national curriculum (Biology: relationships in an ecosystem).
| Programme of study | Lesson |
|---|---|
| the interdependence of organisms in an ecosystem, including food webs and insect pollinated crops | 25.1, 25.2, 25.3 |
| the importance of plant reproduction through insect pollination in human food security | 25.3 |
| how organisms affect, and are affected by, their environment, including the accumulation of toxic materials | 25.2, 25.4 |
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