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Questions and Answers
What is the term for the layer of soil surrounding plant roots?
What is the term for the layer of soil surrounding plant roots?
- Topsoil
- Rhizosphere (correct)
- Bedrock
- Subsoil
How do plants acquire nitrogen?
How do plants acquire nitrogen?
- Through photosynthesis
- Through lightning
- Through soil bacteria (correct)
- Through groundwater
What is the role of Rhizobium bacteria in leguminous plants?
What is the role of Rhizobium bacteria in leguminous plants?
- They produce fruit
- They help in water absorption
- They help in photosynthesis
- They fix nitrogen (correct)
What percentage of plant families have ectomycorrhizae?
What percentage of plant families have ectomycorrhizae?
What is the function of arbuscular mycorrhizae?
What is the function of arbuscular mycorrhizae?
What is the importance of microbes in topsoil?
What is the importance of microbes in topsoil?
What is the function of the fungal sheath formed by ectomycorrhizae?
What is the function of the fungal sheath formed by ectomycorrhizae?
Which type of mycorrhizae is found in the majority of plant species?
Which type of mycorrhizae is found in the majority of plant species?
How do leguminous plants benefit from the presence of Rhizobium bacteria?
How do leguminous plants benefit from the presence of Rhizobium bacteria?
What is the percentage of plant families that have ectomycorrhizae?
What is the percentage of plant families that have ectomycorrhizae?
What is the function of the rhizosphere?
What is the function of the rhizosphere?
Which type of mycorrhizae forms a visible fungal sheath around plant roots?
Which type of mycorrhizae forms a visible fungal sheath around plant roots?
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Study Notes
- Microbes in topsoil are important for plant nutrition.
- The layer of soil surrounding plant roots is called the rhizosphere.
- Plants acquire nitrogen through lightning or soil bacteria.
- Rhizobium bacteria reside in root nodules of leguminous plants and fix nitrogen.
- Ectomycorrhizae form a visible fungal sheath around plant roots and are found in 10% of plant families.
- Arbuscular mycorrhizae are found in 85% of plant species and have a high surface area for metabolite exchange between fungus and plant.
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