Edexcel CB9 Unit Test

Explain the relationship between light intensity and abundance of daisy plants.

The student carries out another investigation to estimate the total number of daisy plants across the whole field. Explain how the quadrat samples should be placed in this investigation.

The field is 100 m by 60 m. Estimate the population of daisy plants in the field.

State and explain the name of the biological relationship between bees and bluebells.

Suggest an explanation for how reintroducing lynx to large forests could increase biodiversity.

Describe how fish are farmed.

Explain how eating farmed fish rather than wild fish can benefit the environment.

Explain how the Venus flytrap is adapted to its environment.

Describe how carbon is exchanged between the biotic and abiotic components of the ecosystem.

Explain why reforestation could help to reduce climate change.