A virus is an infectious agent that cannot be seen through the naked eyes. Virology is the study of viruses and virologists are the biologists who study viruses. Viruses are obligate intracellular parasites because it needs a living host cell for replication. Obligate intracellular parasites do not have the ability to reproduce outside their host cell.

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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 19, Problem 8TYK

Summary Introduction

Introduction: A virus is an infectious agent that cannot be seen through the naked eyes. Virology is the study of viruses and virologists are the biologists who study viruses. Viruses are obligate intracellular parasites because it needs a living host cell for replication. Obligate intracellular parasites do not have the ability to reproduce outside their host cell.

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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 19, Problem 8TYK

Summary Introduction

Introduction: A virus is an infectious agent that cannot be seen through the naked eyes. Virology is the study of viruses and virologists are the biologists who study viruses. Viruses are obligate intracellular parasites because it needs a living host cell for replication. Obligate intracellular parasites do not have the ability to reproduce outside their host cell.

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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 19, Problem 8TYK

Summary Introduction

Introduction: A virus is an infectious agent that cannot be seen through the naked eyes. Virology is the study of viruses and virologists are the biologists who study viruses. Viruses are obligate intracellular parasites because it needs a living host cell for replication. Obligate intracellular parasites do not have the ability to reproduce outside their host cell.

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Answer 4

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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 19, Problem 8TYK

Summary Introduction