Biology Chapter 12 Invertebrate Groups Quiz

Questions and Answers

Which of the following are groups of invertebrates? (Select all that apply)

Mammals

Echinoderms (correct)

Sponges (correct)

Insects

What are the primary characteristics of sponges?

Specialized food cells, reproduce asexually by budding, and sexually.

What are the main features of cnidarians?

Tentacles, tissues with muscle and nerve cells, reproduce sexually and asexually.

How are worms categorized?

Flatworms (simplest), roundworms (more complex), annelids (segmented with complex systems). Signup and view all the answers

What are mollusks characterized by?

Hard outer shell, well-developed organ systems, muscular foot, mantle. Signup and view all the answers

What features are characteristic of echinoderms?

Radial symmetry, center mouths, spines, internal skeletons, water vascular system, tube feet. Signup and view all the answers

What defines arthropods?

Segmented body, outer covering of chitin, exoskeleton, complex body systems. Signup and view all the answers

What types of symmetry exist in animals? (Select all that apply)

Radial symmetry Signup and view all the answers

What are the main differences between insect groups?

Insects have 3 segments, 6 legs, specialized mouthparts, wings, and undergo metamorphosis; crustaceans have complex body systems; arachnids have 2 body segments and spin webs; millipedes have 2 pairs of legs per segment; centipedes have 1 pair of legs per segment. Signup and view all the answers

What are the characteristics of annelids?

Worms with complex digestive, muscular, circulatory, and nervous systems; reproduce asexually and sexually. Signup and view all the answers

Study Notes

Six Invertebrate Groups

Major groups include sponges, cnidarians, worms, mollusks, echinoderms, and arthropods.

Sponges

Characterized by specialized food cells
Reproduce both asexually through budding and sexually.

Cnidarians

Possess tentacles with specialized tissues that have muscle and nerve cells
Can reproduce sexually and asexually.

Worms

Flatworms represent the simplest group of worms
Roundworms are more complex compared to flatworms
Annelids have a segmented structure and possess developed digestive, circulatory, muscular, and nervous systems.

Mollusks

Typically have a hard outer shell
Feature well-developed organ systems
Possess a muscular foot and a mantle.

Echinoderms

Exhibit radial symmetry and have mouths located at their center
Possess external spines and internal skeletons
Feature a water vascular system and tube feet for locomotion.

Arthropods

Characterized by a segmented body and an outer covering made of chitin
Possess an exoskeleton and complex body systems.

Types of Symmetry

Radial symmetry: body parts arranged around a central axis
Bilateral symmetry: body can be divided into mirror-image halves
Asymmetrical: lack of symmetry.

Arthropod Groups: Similarities and Differences

Insects: Three segments, six legs, specialized mouthparts, wings; adaptations for blending into the environment; undergo simple or complete metamorphosis.
Crustaceans: Have complex body systems and a circulatory system.
Arachnids: Two body segments and the ability to spin webs of silk.
Millipedes: Two pairs of legs per body segment.
Centipedes: One pair of legs per body segment.

Annelids

Complex worms equipped with digestive, muscular, circulatory, and nervous systems.
Capable of asexual and sexual reproduction.

Description

Test your knowledge on the six major groups of invertebrates covered in Chapter 12. This quiz features definitions and characteristics of sponges, cnidarians, worms, mollusks, echinoderms, and arthropods. Perfect for reviewing key concepts in biology!