How does mycorrhiza stimulate plant growth?

  • A
    By absorbing inorganic ions from the soil.
  • B
    By helping the plant utilize atmospheric nitrogen.
  • C
    By protecting the plant against pathogens.
  • D
    By acting as a plant growth hormone.

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$Azolla$ possesses a symbiotic association with which of the following?

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Identify the correct statements regarding mycorrhiza:
$(1)$ Many members of the genus $Glomus$ form mycorrhiza.
$(2)$ It is responsible for all mineral absorption from the soil.
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$(4)$ Mycorrhiza is a symbiotic association between fungi and roots of higher plants.

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