About This Chapter
How It Works:
- Identify the lessons in the Holt McDougal Invertebrate Diversity chapter with which you need help.
- Find the corresponding video lessons with this companion course chapter.
- Watch fun videos that cover the invertebrate diversity topics you need to learn or review.
- Complete the quizzes to test your understanding.
- If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.
Students will learn:
- Characteristics that various animals have in common
- Evolutionary history of animals
- The definition of Parazoa
- Characteristics of Radiata and protostomes
- Types of flatworms and roundworms
- Anatomy and reproduction of mollusks
- Structure of annelids
- Traits of echinoderms
- Definition of deuterostomes
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1. Common Characteristics of Members of the Animal Kingdom
From a bat to a sea anemone, the animal kingdom contains a diverse group of organisms. This lesson will outline the characteristics animals share and will explain why critters that seem so different are included in the same kingdom.
2. The Evolution of Animals: Importance & Evolutionary History
The animal kingdom ranges from simple organisms like sponges to complex organisms like humans. We will look at some defining characteristics of animals as well as examples of both invertebrates and vertebrates.
3. Animal Body Plans: Classifications and Features
The Animal Kingdom is diverse and complex. How do we make sense of it all? Scientists use body plans to classify and organize the animals of Earth, making it much easier to differentiate between them.
4. Parazoa: Definition and Characteristics
The sub-kingdom Parazoa is a special group of animals that are unlike any other. In this video lesson, you'll learn about the characteristics of Parazoans and identify what makes them a unique section of the Animal Kingdom.
5. Cnidarians: Types & Examples
Corals and jellyfish belong to a group of invertebrate animals called Cnidarians. In this lesson, you will learn about the classification and biology of these fascinating organisms and their relatives, including one of the most lethal creatures known to mankind: the Australian box jellyfish.
6. Radiata: Definition and Characteristics
The super-phylum Radiata describes a unique and interesting group of animals. In this video lesson you'll identify various animals that belong in this classification as well as describe the characteristics that make them so identifiable.
7. Protostomes: Definition and Characteristics
Though you may not be able to tell just by looking at them, protostomes are an evolutionarily related group based on shared characteristics of their body plans. In this lesson, you will identify these characteristics, as well as see examples of the variety of animals this group encompasses.
8. Flatworms: Types & Structure
Flatworms belong to the phylum Platyhelminthes, which includes planarians, flukes, and tapeworms. Learn more about these animals as you explore the contents of this lesson.
9. Mollusks: Characteristics & Types
Do you like to eat seafood, hunt for seashells, or learn about scary sea creatures? If so, then you'll want to learn about the different types of mollusks, which include the tasty bivalves, the cool-looking gastropods, and the weird cephalopods.
10. Annelids: Types & Structure
Annelids are worms with segmented bodies. Annelids are divided into three main classes. A brief description and example of each class will be provided in this lesson.
11. Echinoderms: Traits, Types & Roles
After watching this lesson, you'll be well on your way to being an echinoderm expert! For example, you'll learn that sea cucumbers help clean up the ocean floor and that starfish can grow back any arms that are broken or damaged.
12. Deuterostomes: Definition and Characteristics
Deuterostomes, like tunicates and urchins, are amazing creatures that are classified together because they share aspects of their evolutionary pasts. In this lesson, you'll identify these characteristics and see what makes this group of animals unique.
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Other chapters within the Holt McDougal Biology: Online Textbook Help course
- Holt McDougal Biology Chapter 1: Biology in the 21st Century
- Holt McDougal Biology Chapter 2: Chemistry of Life
- Holt McDougal Biology Chapter 3: Cell Structure & Function
- Holt McDougal Biology Chapter 4: Cells & Energy
- Holt McDougal Biology Chapter 5: Cell Growth & Division
- Holt McDougal Biology Chapter 6: Meiosis & Mendel
- Holt McDougal Biology Chapter 7: Extending Mendelian Genetics
- Holt McDougal Biology Chapter 8: From DNA to Proteins
- Holt McDougal Biology Chapter 9: Frontiers of Biotechnology
- Holt McDougal Biology Chapter 10: Principles of Evolution
- Holt McDougal Biology Chapter 11: The Evolution of Populations
- Holt McDougal Biology Chapter 12: The History of Life
- Holt McDougal Biology Chapter 13: Principles of Ecology
- Holt McDougal Biology Chapter 14: Interactions in Ecosystems
- Holt McDougal Biology Chapter 15: The Biosphere
- Holt McDougal Biology Chapter 16: Human Impact on Ecosystems
- Holt McDougal Biology Chapter 17: The Tree of Life
- Holt McDougal Biology Chapter 18: Viruses & Prokaryotes
- Holt McDougal Biology Chapter 19: Protists & Fungi
- Holt McDougal Biology Chapter 20: Plant Diversity
- Holt McDougal Biology Chapter 21: Plant Structure & Function
- Holt McDougal Biology Chapter 22: Plant Growth, Reproduction & Response
- Holt McDougal Biology Chapter 24: A Closer Look at Arthropods
- Holt McDougal Biology Chapter 25: Vertebrate Diversity
- Holt McDougal Biology Chapter 26: A Closer Look at Amniotes
- Holt McDougal Biology Chapter 27: Animal Behavior
- Holt McDougal Biology Chapter 28: Human Systems & Homeostasis
- Holt McDougal Biology Chapter 29: Nervous & Endocrine Systems
- Holt McDougal Biology Chapter 30: Respiratory & Circulatory Systems
- Holt McDougal Biology Chapter 31: Immune System & Disease
- Holt McDougal Biology Chapter 32: Digestive & Excretory Systems
- Holt McDougal Biology Chapter 33: Protection, Support & Movement
- Holt McDougal Biology Chapter 34: Reproduction & Development