The evidence that cnidarians share a more recent common ancestor with other animals than with sponges. Concept introduction : Sponges belong to a phylum called porifera. They have cellular level of organization that is their body is made up aggregates of cells. They have pores in their whole body. These pores help in exchange of nutrient and also remove waste materials. Sponges are primitive animals that diverged from other animals early in the evolution. Certain recent studies have concluded that the sponges are monophyletic. Cnidaria is a phylum that contains approximately 10,000 species of animals. The animals in this group are usually aquatic (freshwater and marine). They possess a specialized cell called cnidocyte. The cnidocyte helps in capturing prey. The cnidarians are radially symmetrical and have tissue level of organization.

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Answer 1

Question

Chapter 32.4, Problem 1CC

Summary Introduction

To describe: The evidence that cnidarians share a more recent common ancestor with other animals than with sponges.

Concept introduction: Sponges belong to a phylum called porifera. They have cellular level of organization that is their body is made up aggregates of cells. They have pores in their whole body. These pores help in exchange of nutrient and also remove waste materials. Sponges are primitive animals that diverged from other animals early in the evolution. Certain recent studies have concluded that the sponges are monophyletic.

Cnidaria is a phylum that contains approximately 10,000 species of animals. The animals in this group are usually aquatic (freshwater and marine). They possess a specialized cell called cnidocyte. The cnidocyte helps in capturing prey. The cnidarians are radially symmetrical and have tissue level of organization.

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compare cnidarians to sponges and to the clade containing flatworms, mollusks, and annelids. What features are similar among these groups? What features are different?

Explain how cnidarians are more anatomically complexthan sponges.

Compare and contrast the hydraulic skeleton of molluscs with the hydrostatic skeletons of cnidarians and pseudocoelomates.

Answer 2

Question

Chapter 32.4, Problem 1CC

Summary Introduction

To describe: The evidence that cnidarians share a more recent common ancestor with other animals than with sponges.

Concept introduction: Sponges belong to a phylum called porifera. They have cellular level of organization that is their body is made up aggregates of cells. They have pores in their whole body. These pores help in exchange of nutrient and also remove waste materials. Sponges are primitive animals that diverged from other animals early in the evolution. Certain recent studies have concluded that the sponges are monophyletic.

Cnidaria is a phylum that contains approximately 10,000 species of animals. The animals in this group are usually aquatic (freshwater and marine). They possess a specialized cell called cnidocyte. The cnidocyte helps in capturing prey. The cnidarians are radially symmetrical and have tissue level of organization.

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Answer 3

Question

Chapter 32.4, Problem 1CC

Summary Introduction

To describe: The evidence that cnidarians share a more recent common ancestor with other animals than with sponges.

Concept introduction: Sponges belong to a phylum called porifera. They have cellular level of organization that is their body is made up aggregates of cells. They have pores in their whole body. These pores help in exchange of nutrient and also remove waste materials. Sponges are primitive animals that diverged from other animals early in the evolution. Certain recent studies have concluded that the sponges are monophyletic.

Cnidaria is a phylum that contains approximately 10,000 species of animals. The animals in this group are usually aquatic (freshwater and marine). They possess a specialized cell called cnidocyte. The cnidocyte helps in capturing prey. The cnidarians are radially symmetrical and have tissue level of organization.

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Answer 4

Question

Chapter 32.4, Problem 1CC

Summary Introduction

To describe: The evidence that cnidarians share a more recent common ancestor with other animals than with sponges.

Concept introduction: Sponges belong to a phylum called porifera. They have cellular level of organization that is their body is made up aggregates of cells. They have pores in their whole body. These pores help in exchange of nutrient and also remove waste materials. Sponges are primitive animals that diverged from other animals early in the evolution. Certain recent studies have concluded that the sponges are monophyletic.

Cnidaria is a phylum that contains approximately 10,000 species of animals. The animals in this group are usually aquatic (freshwater and marine). They possess a specialized cell called cnidocyte. The cnidocyte helps in capturing prey. The cnidarians are radially symmetrical and have tissue level of organization.

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Answer 5

Chapter 32.4, Problem 1CC

Summary Introduction

To describe: The evidence that cnidarians share a more recent common ancestor with other animals than with sponges.

Concept introduction: Sponges belong to a phylum called porifera. They have cellular level of organization that is their body is made up aggregates of cells. They have pores in their whole body. These pores help in exchange of nutrient and also remove waste materials. Sponges are primitive animals that diverged from other animals early in the evolution. Certain recent studies have concluded that the sponges are monophyletic.

Cnidaria is a phylum that contains approximately 10,000 species of animals. The animals in this group are usually aquatic (freshwater and marine). They possess a specialized cell called cnidocyte. The cnidocyte helps in capturing prey. The cnidarians are radially symmetrical and have tissue level of organization.

Answer 6

Chapter 32.4, Problem 1CC

Summary Introduction

To describe: The evidence that cnidarians share a more recent common ancestor with other animals than with sponges.

Concept introduction: Sponges belong to a phylum called porifera. They have cellular level of organization that is their body is made up aggregates of cells. They have pores in their whole body. These pores help in exchange of nutrient and also remove waste materials. Sponges are primitive animals that diverged from other animals early in the evolution. Certain recent studies have concluded that the sponges are monophyletic.

Cnidaria is a phylum that contains approximately 10,000 species of animals. The animals in this group are usually aquatic (freshwater and marine). They possess a specialized cell called cnidocyte. The cnidocyte helps in capturing prey. The cnidarians are radially symmetrical and have tissue level of organization.

Answer 7

Chapter 32.4, Problem 1CC

Summary Introduction

To describe: The evidence that cnidarians share a more recent common ancestor with other animals than with sponges.

Concept introduction: Sponges belong to a phylum called porifera. They have cellular level of organization that is their body is made up aggregates of cells. They have pores in their whole body. These pores help in exchange of nutrient and also remove waste materials. Sponges are primitive animals that diverged from other animals early in the evolution. Certain recent studies have concluded that the sponges are monophyletic.

Cnidaria is a phylum that contains approximately 10,000 species of animals. The animals in this group are usually aquatic (freshwater and marine). They possess a specialized cell called cnidocyte. The cnidocyte helps in capturing prey. The cnidarians are radially symmetrical and have tissue level of organization.

Answer 8

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Answer 11

Ch. 32.1 - Summarize the main stages of animal development....Ch. 32.1 - WHAT IF? What animal characteristics would be...Ch. 32.2 - Put the following milestones in animal evolution...Ch. 32.2 - VISUAL SKILLS Explain what is represented by the...Ch. 32.2 - MAKE CONNECTIONS Evaluate whether the origin of...Ch. 32.3 - Distinguish the terms grade and clade.Ch. 32.3 - Compare three aspects of the early development of...Ch. 32.3 - Prob. 3CC Ch. 32.4 - Prob. 1CC Ch. 32.4 - WHAT IF? Suppose ctenophores are basal metazoans...

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