Animal Phyla

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What is a phylum in biological classification?

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A phylum is a level of classification in the biological taxonomy that groups together organisms based on shared characteristics and evolutionary history.

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What are mollusks?

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Mollusks are a diverse group of invertebrate animals that include snails, clams, and octopuses, characterized by a soft body, often with a hard shell.

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What is radial symmetry?

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Radial symmetry is a type of symmetry where body parts are arranged around a central axis, allowing for multiple lines of symmetry.

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What is bilateral symmetry?

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Bilateral symmetry is a type of symmetry where the body can be divided into two identical halves along one plane.

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What is asymmetry in animals?

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Asymmetry refers to a lack of symmetry in an organism's body structure, meaning it cannot be divided into similar halves.

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What are echinoderms?

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Echinoderms are marine animals characterized by a hard, spiny outer body covering and radial symmetry, including starfish and sea urchins.

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What are cnidarians?

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Cnidarians are a phylum of animals that include jellyfish, corals, and sea anemones, known for their stinging cells called cnidocytes.

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What is the significance of body symmetry in animals?

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Body symmetry can influence an animal's movement, behavior, and evolutionary adaptations, affecting how they interact with their environment.

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What are arthropods?

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Arthropods are the largest phylum of animals, including insects, arachnids, and crustaceans, characterized by an exoskeleton, segmented body, and jointed appendages.

Front

What is the role of a hard shell in mollusks?

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The hard shell in mollusks provides protection from predators and environmental hazards, and it can also help prevent desiccation.