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Chapter 24: Q.3 (page 637)

If symbiotic fungi are absent from the soil, what impact do you think this would have on plant growth?

Short Answer

Expert verified

If symbiotic fungi are absent from the soil then plants cannot absorb adequate nutrients, water, and minerals which stunts their growth.

Step by step solution

01

Step1. Introduction 

Symbiosis is the interaction between two dissimilar organisms living in close physical association. Mycorrhizae are symbiotic relationships that form between fungi and plants.

02

Step2. Explanation 

The fungi colonize the root system of a host plant, providing increased water and nutrient absorption capabilities while the plant provides the fungus with carbohydrates formed from photosynthesis.

Without mycorrhiza, plants cannot absorb adequate nutrients, water, and minerals which stunts their growth.

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Most popular questions from this chapter

Which of the following statements is true?

a. A basidium is the fruiting body of a mushroom producing fungus, and it forms four basidiocarps.

b. The result of the plasmogamy step is four basidiospores.

c. Karyogamy results directly in the formation of mycelia.

d. A basidiocarp is the fruiting body of a mushroom producing fungus.

Consider an ecosystem where all the fungi not involved in mycorrhizae are eliminated. How would this affect nitrogen intake by plants?

a. Nitrogen intake would increase.

b. Nitrogen intake would not change.

c. Nitrogen intake would decrease.

d. Nitrogen intake would stop.

The targets for anti-fungal drugs are much more limited than antibiotics or anti-viral medications. Why?

a. There are more bacteria and viruses than fungi.

b. Fungi can only be targeted during sexual reproduction, while bacteria and viruses can be targeted at any point in their lifespan.

c. Fungi cause topical infections, while viruses and bacteria cause systemic infections.

d. Human cells are much more similar to fungi cells than bacteria or viruses.

Which of the following statements is true?

a. A dikaryotic ascus that forms in the ascocarp undergoes karyogamy, meiosis, and mitosis to form eight ascospores.

b. A diploid ascus that forms in the ascocarp undergoes karyogamy, meiosis, and mitosis to form eight ascospores.

c. A haploid zygote that forms in the ascocarp undergoes karyogamy, meiosis, and mitosis to form eight ascospores.

d. A dikaryotic ascus that forms in the ascocarp undergoes plasmogamy, meiosis, and mitosis to form eight ascospores.

What term describes the close association of a fungus with the root of a tree?

a. a rhizoid

b. a lichen

c. a mycorrhiza

d. an endophyte
See all solutions

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