The parasitic and host partner in controlled parasitism in lichen. Introduction: Lichen is a symbiotic association which is present between algae and fungus . They are slow growing and can live for centuries. Lichens can be found growing in almost all parts of the terrestrial world from tropical rain forest to mobile sand dunes. They secrete some chemicals which help in weathering of rocks which leads to soil formation.

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 29.4, Problem 3C

Summary Introduction

To determine: The parasitic and host partner in controlled parasitism in lichen.

Introduction: Lichen is a symbiotic association which is present between algae and fungus. They are slow growing and can live for centuries. Lichens can be found growing in almost all parts of the terrestrial world from tropical rain forest to mobile sand dunes. They secrete some chemicals which help in weathering of rocks which leads to soil formation.

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Many biologists consider a lichen an example of controlled parasitism. In this view, which component is the likely parasite, and which is the likely host?

What is a lichen? Why is this considered an example of a parasite-host relationship? Why might you also consider it a mutualistic interaction?

Parasitism is a symbiotic relationship, where the parasite (symbiont) obtains nutrients from its host. 2) Describe one invertebrate endoparasite you find interesting and identify its definitive host (and any intermediate hosts). 3) Describe one invertebrate ectoparasite you find interesting and identify its definitive host (and any intermediate hosts).

Answer 2

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 29.4, Problem 3C

Summary Introduction

To determine: The parasitic and host partner in controlled parasitism in lichen.

Introduction: Lichen is a symbiotic association which is present between algae and fungus. They are slow growing and can live for centuries. Lichens can be found growing in almost all parts of the terrestrial world from tropical rain forest to mobile sand dunes. They secrete some chemicals which help in weathering of rocks which leads to soil formation.

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Check out a sample textbook solution

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Answer 3

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 29.4, Problem 3C

Summary Introduction

To determine: The parasitic and host partner in controlled parasitism in lichen.

Introduction: Lichen is a symbiotic association which is present between algae and fungus. They are slow growing and can live for centuries. Lichens can be found growing in almost all parts of the terrestrial world from tropical rain forest to mobile sand dunes. They secrete some chemicals which help in weathering of rocks which leads to soil formation.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

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Answer 4

Question

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 29.4, Problem 3C

Summary Introduction