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Topic 4 Revision ­ Interdependence

IINTERDEPENDENCE: When animals depend on each other for their survival
Lichens are organisms made up of green algae and fungi. The green algae produce food by photosynthesis.
Algae share the food they make by photosynthesis with the fungi. The fungi provide water and minerals for…

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How human activity, including differing economical and industrial conditions, can affect the environment and
cause changes in sizes of population
Case Study: How human activity may have caused the change in the percentage of elephants without tusks.
1. Poachers kill tusked elephants for their tusks
2. More elephants without tusks…

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Impact on wildlife e.g. polar bear / seals or migration patterns

The graph shows how global temperatures have risen or fallen in relation to the average global temperature. This
average temperature is shown as zero on the

CONSERVATION: Protection or careful management of the environment or natural resources

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The Giant Panda is an endangered species because:
Unable to compete with human population
Loss of habitat/deforestation
Climate change
Reduced food supply/hunting/poaching/disease
Inability to find a mate because the population is fragmented
What could be done to increase numbers?
Link up the different areas again
Plant bamboo
Set up reserves/breeding…

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Further adaptations of geese:
Thicker fat layer for insulation
Thicker feathers
Use wings more to produce more heat
Strong flyers/strong feathers
Flying in formation
Large food reserves/higher proportion of fat in food reserves
Can tolerate water collecting in tissues
Bigger wings
Eyes have feathers to shade them



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