Consider the following features: (a) Organ system level of organisation (b) Bilateral symmetry (c) True coelomates with segmentation of body Select the correct option of animal groups which possess all the above characteristics.
medium
Animal Kingdom
2019
biology
Annelida, Arthropoda and Chordata
Annelida, Arthropoda and Mollusca
Arthropoda, Mollusca and Chordata
Annelida, Mollusca and Chordata
Explanation
To solve this problem, we need to identify the animal groups that possess all the given characteristics:ā(a) Organ system level of organisationā(b) Bilateral symmetryā(c) True coelomates with segmentation of bodyLet's analyze each option:āOption 1: Annelida, Arthropoda and Chordata
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- Annelida: They have an organ system level of organisation, bilateral symmetry, and are true coelomates with segmented bodies.
- Arthropoda: They also possess an organ system level of organisation, bilateral symmetry, and are true coelomates with segmented bodies.
- Chordata: They have an organ system level of organisation, bilateral symmetry, and are true coelomates. Many chordates, like vertebrates, show segmentation (e.g., vertebral column).
- Therefore, all three groups in Option 1 meet the criteria.
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Option 2: Annelida, Arthropoda and Mollusca
- Mollusca: They have an organ system level of organisation and bilateral symmetry, but they are not segmented.
- Therefore, Option 2 does not meet all the criteria.
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Option 3: Arthropoda, Mollusca and Chordata
- As mentioned, Mollusca are not segmented, so this option does not meet all the criteria.
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Option 4: Annelida, Mollusca and Chordata
- Again, Mollusca are not segmented, so this option does not meet all the criteria.
Therefore, the correct option is Option 1: Annelida, Arthropoda and Chordata.