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The symbiotic association between fungi and the roots of plants is called: (a) Hyphae (b) Plasmogamy (c) Mycorrhizae (d) Karyogamy (e) Dimorphism

Short Answer

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(c) Mycorrhizae

Step by step solution

01

Understand the Terms

To solve this exercise, begin by understanding the terms given in the options. Each term refers to a different biological concept. - **Hyphae**: These are the thread-like structures that make up the body of a fungus. - **Plasmogamy**: This is the stage in fungal reproduction where the cytoplasm of two parent cells fuses together without the fusion of nuclei. - **Mycorrhizae**: This refers to the symbiotic association between a fungus and the roots of a plant. - **Karyogamy**: This is the stage in the fungal life cycle where the nuclei from two different cells fuse together. - **Dimorphism**: This refers to the ability of some fungi to exist in two different forms, depending on environmental conditions.
02

Identify Key Concept

The question is asking for the term that describes the symbiotic relationship between fungi and plant roots. Based on the descriptions provided previously, identify "mycorrhizae" as the correct term, which specifically refers to this type of symbiotic association.
03

Select the Correct Answer

From the options provided: - (a) Hyphae - (b) Plasmogamy - (c) Mycorrhizae - (d) Karyogamy - (e) Dimorphism Select option (c) Mycorrhizae as it matches the description of the symbiotic association between fungi and roots of plants.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Symbiosis
Symbiosis is the interaction between two different organisms that live in close physical proximity, often to the benefit of one or both parties involved. It can take various forms, such as mutualism, commensalism, or parasitism. In the context of fungi and plants, this relationship often appears in the form of mycorrhizae, a mutualistic association. Here, both organisms benefit:
  • Fungi gain access to carbohydrates formed during photosynthesis from the plants.
  • Plants receive enhanced water and nutrient absorption capabilities through the extensive fungal network.

Understanding symbiosis helps underscore the interconnectedness of life forms and their mutually dependent relationships in ecosystems. This concept is pivotal in ecology and sustains various life forms by promoting nutrient exchange and providing ecological stability.
Fungal Biology
Fungal biology studies fungi, which are unique organisms separate from plants, animals, and bacteria. Fungi have a distinct cell wall made of chitin, and they obtain nutrients through absorption rather than through photosynthesis like plants.
  • Fungi reproduce through spores, and their structures include hyphae, which form a network called mycelium.
  • They often engage in complex life cycles involving plasmogamy (fusion of cytoplasm) and karyogamy (fusion of nuclei).
Fungi play crucial roles in ecosystems as decomposers, breaking down complex organic substances into simpler compounds. They also engage in beneficial symbiotic relationships, such as mycorrhizae with plants. Fungal biology provides insight into the fascinating life cycles and ecological significance of fungi in nature.
Plant-Fungi Interaction
The interaction between plants and fungi is fascinating and diverse, often leading to the formation of mycorrhizae. This association enhances the survival and thriving of both organisms involved. By establishing a mycorrhizal relationship, plants access a larger soil area through the expansive network of fungal hyphae. This enables the plant to absorb more water and essential nutrients like phosphorus and nitrogen.

Simultaneously, fungi benefit by obtaining carbohydrates produced by the plants during photosynthesis. Such interactions illustrate the collaborative nature found in ecosystems and demonstrate how species work together for mutual benefit. These partnerships significantly impact plant growth and health and play a critical role in maintaining healthy soil ecosystems.
Understanding plant-fungi interactions is essential in applied science fields, such as agriculture and environmental management. By leveraging this knowledge, humans can improve crop yields, promote soil health, and maintain biodiversity.

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Most popular questions from this chapter

Match the following microorganisms and their descriptions: _____Sac fungi _____Water molds _____Bread molds _____Club fungi _____Dimorphic fungi (a) Produce zygospores (b) Produce ascospores in an ascus (c) Produce basidiospores (d) Produce motile sexual and asexual spores (e) Exhibit yeastlike growth at \(37^{\circ} \mathrm{C}\) and moldlike growth at \(25^{\circ} \mathrm{C}\)

Match the following (more than one may apply): _____Lice _____Tapeworm _____Biting mosquito _____Housefly walking on manure _____Ringworm fungus (a) Ecotoparasite (b) Endoparasite (c) Facultative parasite (d) Permanent parasite (e) Temporary parasite (f) Biological vector (g) Mechanical vector

Fungi Imperfecti or Deuteromycota: (a) Do not have complete hyphae (b) Do not form hyphae (c) Have no observed sexual stage (d) Cannot form conidia (e) Only form antheridia

With which of the following is a dinoflagellate associated? (a) Most usually have flagella and can carry out photosynthesis. (b) Some produce toxins that accumulate in the bodies ofshellfish. (c) Blooms of dinoflagellates are known as the "red tide." (d) Inhalation of air that contains small quantities of dinoflagellate toxin can cause respiratory membrane irritation in sensitive individuals. (e) All of the above are characteristics associated with dinoflagellates.

All of the following are mechanisms used by parasites to evade host defenses EXCEPT: (a) Parasite causes host's immune system to make antibodies that cannot react with the parasite's antigens. (b) Encystment. (c) Parasite kills the host. (d) Parasite changes its surface antigen faster than the host can make new antibodies. (e) Parasite invades host cells where it is out of the reach of host defense mechanisms.

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