Question 4
Which one is a true fish?

(a) Jellyfish
(b) Starfish
(c) Dogfish
(d) Silverfish

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Solution

(c) Dogfish

Dog fish is a true fish because it belongs to class-Chondricythes i.e., Pisces (phylum chordate). Jellyfish belongs to phylum Cnidaria. Starfish are star shaped echinoderms, which are marine invertebrates which have a central disc and five arms. Silver fish is small wingless insect belongs to phylum-Arthropod.

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Question 4
Which one is a true fish?

(a) Jellyfish
(b) Starfish
(c) Dogfish
(d) Silverfish

Which of the following sets of animals belong to a single taxonomic group?

(a) Cuttlefish, jellyfish, silverfish, dogfish, starfish

(b) bat, pigeon, butterfly

(d) Silkworm, tapeworm, earthworm

Which ones of the following animals are invertebrates?

Housefly, silverfish, trout, jellyfish, whale, penguin, lizard and sponge.

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