Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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### Multiple-Choice Question: Biological Classification

#### Question:
Octopi are ____.

#### Options:
- ○ crustaceans
- ○ molluscs
- ○ cnidarians
- ○ arthropods

#### Explanation:
This multiple-choice question asks the student to classify octopi. The correct choice should be selected from the given options: crustaceans, molluscs, cnidarians, and arthropods. 

#### Detailed Insights on the Options:
- **Crustaceans:** These are primarily aquatic animals with segmented bodies, exoskeletons, and jointed appendages. Examples include crabs, lobsters, and shrimp.
- **Molluscs:** This category includes a diverse group of invertebrate animals, many of which have a soft body and may possess a hard shell. Examples include octopi, snails, and clams.
- **Cnidarians:** These are predominantly aquatic species that have a simple body structure with a single opening. Examples include jellyfish, corals, and sea anemones.
- **Arthropods:** This is the largest phylum in the animal kingdom, characterized by jointed limbs, segmented bodies, and exoskeletons. Examples include insects, spiders, and crustaceans.

When responding to this question, consider the anatomical and physiological characteristics of octopi and match them to the appropriate classification.
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Transcribed Image Text:### Multiple-Choice Question: Biological Classification #### Question: Octopi are ____. #### Options: - ○ crustaceans - ○ molluscs - ○ cnidarians - ○ arthropods #### Explanation: This multiple-choice question asks the student to classify octopi. The correct choice should be selected from the given options: crustaceans, molluscs, cnidarians, and arthropods. #### Detailed Insights on the Options: - **Crustaceans:** These are primarily aquatic animals with segmented bodies, exoskeletons, and jointed appendages. Examples include crabs, lobsters, and shrimp. - **Molluscs:** This category includes a diverse group of invertebrate animals, many of which have a soft body and may possess a hard shell. Examples include octopi, snails, and clams. - **Cnidarians:** These are predominantly aquatic species that have a simple body structure with a single opening. Examples include jellyfish, corals, and sea anemones. - **Arthropods:** This is the largest phylum in the animal kingdom, characterized by jointed limbs, segmented bodies, and exoskeletons. Examples include insects, spiders, and crustaceans. When responding to this question, consider the anatomical and physiological characteristics of octopi and match them to the appropriate classification.
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