Whether the hypothesis that Mesomycetozoa is the sister group of animals is correct or not. Concept introduction : The sponges possess flagellated cells called choanocytes. These choanocytes show similarity with the cells of choanoflagellates suggesting that the animals evolved from a choanoflagellate as their ancestor. Choanoflagellates are a group of single celled protists. They are found in both marine and freshwater. They have flagella that help them in locomotion and feeding as in sponges. They are filter feeders. They filter out bacteria and food particle from surrounding water.

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Answer 1

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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 33.1, Problem 2CC

Summary Introduction

To determine: Whether the hypothesis that Mesomycetozoa is the sister group of animals is correct or not.

Concept introduction: The sponges possess flagellated cells called choanocytes. These choanocytes show similarity with the cells of choanoflagellates suggesting that the animals evolved from a choanoflagellate as their ancestor.

Choanoflagellates are a group of single celled protists. They are found in both marine and freshwater. They have flagella that help them in locomotion and feeding as in sponges. They are filter feeders. They filter out bacteria and food particle from surrounding water.

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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 33.1, Problem 2CC

Summary Introduction

To determine: Whether the hypothesis that Mesomycetozoa is the sister group of animals is correct or not.

Concept introduction: The sponges possess flagellated cells called choanocytes. These choanocytes show similarity with the cells of choanoflagellates suggesting that the animals evolved from a choanoflagellate as their ancestor.

Choanoflagellates are a group of single celled protists. They are found in both marine and freshwater. They have flagella that help them in locomotion and feeding as in sponges. They are filter feeders. They filter out bacteria and food particle from surrounding water.

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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 33.1, Problem 2CC

Summary Introduction

To determine: Whether the hypothesis that Mesomycetozoa is the sister group of animals is correct or not.

Concept introduction: The sponges possess flagellated cells called choanocytes. These choanocytes show similarity with the cells of choanoflagellates suggesting that the animals evolved from a choanoflagellate as their ancestor.

Choanoflagellates are a group of single celled protists. They are found in both marine and freshwater. They have flagella that help them in locomotion and feeding as in sponges. They are filter feeders. They filter out bacteria and food particle from surrounding water.

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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 33.1, Problem 2CC

Summary Introduction