Q: Among the following organisms, which one does not belong to the class of other three?
a) Crab
b) Mite
c) Scorpion
d) Spider
The correct answer is Option 1.
Mite, Scorpion, and Spider are Arachnids, while Crab is a Crustacean. Hence, Option 1 is correct.
Crustacean-
- Phylum:Â Arthropoda
- Kingdom:Â Animalia
- Scientific name:Â Crustacea
- Crustacean is generally aquatic and differ from other arthropods in having two pairs of appendages (antennules and antennae) in front of the mouth and paired appendages near the mouth that function as jaws.
- Crabs, lobsters, shrimps, and woodlice are among the best-known crustaceans.
Arachnids any member of the arthropod group that includes spiders, daddy longlegs, scorpions, and the mites and ticks.
- Phylum:Â Arthropoda
- Kingdom:Â Animalia
- Scientific name:Â Arachnida
- All Arachnids have eight legs, and unlike insects, they don’t have antennae.
- The bodies of Arachnids are divided into two sections, the cephalothorax in front and the abdomen behind.
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