Q. Which of the following is a defining characteristic of the phylum Annelida? (2023)
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A.
Body divided into segments
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B.
Presence of a shell
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C.
Radial symmetry
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D.
Jointed appendages
Solution
Annelids, such as earthworms, are characterized by their segmented bodies, which is a defining feature of this phylum.
Correct Answer: A — Body divided into segments
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Q. Which of the following is a defining feature of the phylum Mollusca? (2023)
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A.
Jointed legs
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B.
Soft-bodied with a hard shell
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C.
Radial symmetry
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D.
Presence of a notochord
Solution
Mollusca includes soft-bodied animals, many of which have a hard shell for protection.
Correct Answer: B — Soft-bodied with a hard shell
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Q. Which of the following is a feature of the phylum Annelida? (2022)
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A.
Body divided into segments
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B.
Presence of a shell
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C.
Radial symmetry
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D.
Exoskeleton
Solution
Annelids, such as earthworms, are characterized by their segmented bodies.
Correct Answer: A — Body divided into segments
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Q. Which of the following is a feature of the phylum Arthropoda? (2023)
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A.
Presence of a backbone
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B.
Jointed appendages
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C.
Soft body
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D.
Radial symmetry
Solution
Arthropods are known for their jointed appendages, which aid in movement and feeding.
Correct Answer: B — Jointed appendages
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Q. Which of the following is a feature of the phylum Echinodermata? (2020)
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A.
Radial symmetry
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B.
Exoskeleton made of chitin
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C.
Jointed appendages
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D.
Body divided into segments
Solution
Echinoderms exhibit radial symmetry and have a calcareous endoskeleton.
Correct Answer: A — Radial symmetry
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Q. Which of the following is a feature of the phylum Platyhelminthes? (2019)
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A.
Coelomate body plan
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B.
Flat body shape
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C.
Jointed appendages
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D.
Presence of a shell
Solution
Platyhelminthes, or flatworms, are characterized by their flat body shape and lack of a coelom.
Correct Answer: B — Flat body shape
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Q. Which of the following is a feature of the phylum Porifera? (2020)
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A.
Body is segmented
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B.
Presence of a true coelom
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C.
Body is porous
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D.
Radial symmetry
Solution
Porifera, or sponges, are characterized by their porous bodies that allow water to flow through.
Correct Answer: C — Body is porous
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Q. Which of the following is NOT a characteristic of the phylum Echinodermata? (2022)
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A.
Radial symmetry
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B.
Water vascular system
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C.
Presence of a notochord
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D.
Tube feet
Solution
Echinodermata do not possess a notochord; this feature is characteristic of Chordata.
Correct Answer: C — Presence of a notochord
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Q. Which of the following is NOT a characteristic of the phylum Mollusca? (2022)
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A.
Soft-bodied
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B.
Presence of a shell
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C.
Jointed legs
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D.
Mantle
Solution
Phylum Mollusca is characterized by soft bodies, often with a shell, and a mantle, but they do not have jointed legs.
Correct Answer: C — Jointed legs
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Q. Which of the following is NOT a characteristic of the phylum Porifera? (2023)
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A.
Multicellular
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B.
Presence of true tissues
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C.
Aquatic habitat
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D.
Filter feeders
Solution
Porifera, or sponges, lack true tissues, which distinguishes them from other multicellular organisms.
Correct Answer: B — Presence of true tissues
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Q. Which of the following organisms is an example of a cnidarian? (2021)
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A.
Jellyfish
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B.
Earthworm
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C.
Lobster
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D.
Starfish
Solution
Jellyfish belong to the phylum Cnidaria, which is known for its stinging cells called cnidocytes.
Correct Answer: A — Jellyfish
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