Question

Certain characteristics are given. Name the phylum/class:
1. Mainly marine, locomotion by tube feet, radial symmetry.
2. Streamlined body, aquatic, body covered with scales.

Answer 1

Answer:

1. Phylum Echinodermata
2. Pisces from phylum Chordata (vertebrata)

Explanation:

1. Mainly marine, locomotion by tube feet, radial symmetry are all the character shown by animals like starfish, sea urchin, sea cucumber who are considered as a part of Echinodermata (the last phylum of nonchordata (if we are not considering hemichordate))
2. Streamlined body, aquatic, body covered with scales are all the features shown by fishes i.e. Pisces.  

• Scales protect fish, much like a suit of armor. All fish have a slimy covering of mucus. This substance allows the fish to swim through the water with very little drag and also makes it difficult for other organism to attach to the fish.
• The body of fish is long and pointed at both the ends. This is called streamlined shape. This shape helps the animal to move faster through water, it reduces water resistance while moving.

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