AP BIOLOGY

CLASSIFICATION

NINE COMMON ANIMAL PHYLA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which phylum includes classes cubozoans (box jellyfish), anthozoans (sea anemones), scyphozoans (true jellyfish), and hydrozoans (freshwater hydra)?
A
mollusca
B
arthropoda
C
cnidaria
D
chordata
Explanation: 

Detailed explanation-1: -Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans. The phylum Cnidaria is made up of four classes: Hydrozoa (hydrozoans); Scyphozoa (scyphozoans); Anthozoa (anthozoans); and Cubozoa (cubozoans).

Detailed explanation-2: -Complete answer: Jellyfish are mainly marine animals that belong to the class Scyphozoa of the phylum Cnidaria.

Detailed explanation-3: -Out of all cnidarians, cubozoans are the most venomous. Hydrozoans are polymorphs, existing as solitary polyps, solitary medusae, or as colonies. Hydrozoans are unique from all other cnidarians in that their gonads are derived from epidermal tissue.

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