Multiple Choice
Which of these describes the initial interaction between Rhizobium and a soybean root?
35. Soil
Nitrogen Fixation
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Mycorrhizae develop __________.
A
as stored nutrients to support the plant when necessary
B
only in plants such as mistletoe that parasitize other plants
C
when soil is too compact and lacks sufficient air spaces
D
to control the evaporation of water from leaves
E
between roots and beneficial fungi
Verified step by step guidance1
Understand the concept of mycorrhizae: Mycorrhizae are symbiotic associations between the roots of most plants and fungi. This relationship is mutualistic, meaning both the plant and the fungus benefit from it.
Identify the role of mycorrhizae: The fungi help the plant by increasing water and nutrient absorption capabilities, while the plant provides the fungi with carbohydrates formed during photosynthesis.
Analyze the options given: Consider each option and determine if it aligns with the known function and formation of mycorrhizae.
Evaluate the correct context: Mycorrhizae do not develop as stored nutrients, in parasitic plants, due to compact soil, or to control evaporation. They form specifically between plant roots and fungi.
Conclude with the correct answer: The correct context for the development of mycorrhizae is between roots and beneficial fungi, as this is where the symbiotic relationship occurs.
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