Diversity in Living Organisms — Science STD 9 — Question
Gujarat BoardEnglish MediumSTD 9ScienceDiversity in Living Organisms1 Mark
MCQ
Which one is a true fish?
A
Jellyfish.
B
Starfish.
✓
Dogfish.
D
Silverfish.
✓
Answer
Correct option: C.
Dogfish.
Jellyfish or jellies are approximately cylindrical vase shaped individuals of phylum$-$Cnidaria. These are free swimming marine animals consisting of a gelatinous umbrella shaped bell $($pulsate for locomotion$)$ and tentacles $($to capture prey$).$ Starfish are star shaped echinoderms. These are marine invertebrates which have a central disc and five arms, $($tube feet for locomotion$)$ Scoliodon $($dog fish$)$ belongs to the class$-$Chondricythes, i.e., pisces. These fishes are known as dog fish due to their, ability to smell. Lepismasacharina commonly known as silver fish is small wingless insect belongs to phylum$-$ Arthropoda.
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