Quiz

Life in the soil — quick check

3 questions · Pass at 70% · +30 pts on first pass

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Question 1 · Single choice — select one

Which statement best describes why soil is often referred to as a "living network"?

Soil contains many different minerals and rock particles. Soil organisms live independently but occupy the same space. Soil organisms are connected through interactions such as exchanges, partnerships, and movement pathways. Soil organisms interact only when nutrients are scarce.

Question 2 · Multiple choice — select all that apply

The partnerships between plants and nitrogen-fixing bacteria and between plants and mycorrhizal fungi have which features in common?

The plant provides carbon compounds produced through photosynthesis. Both partners benefit from the interaction. The microorganisms help plants gain access to resources they would otherwise struggle to obtain. The microorganisms transport plants through the soil. The interaction occurs only in agricultural soils.

Question 3 · Single choice — select one

A soil bacterium needs to reach a nutrient-rich hotspot several centimetres away. Based on the concept of fungal highways, which route is most likely to help it get there?

Remaining attached to a soil particle and waiting for nutrients to arrive. Moving along fungal hyphae that connect different parts of the soil. Travelling through plant roots. Converting atmospheric nitrogen into plant nutrients.