Which phylum has animals with joined legs?

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Mollusca

Nematoda

Arthropoda

Echinodermata

answer is C.

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Detailed Solution

The term "Arthropoda" refers to "jointed appendages", it is a phylum of the kingdom Animalia. Houseflies, spiders, scorpions, prawns, butterflies, and crabs are some examples.
Some more features of the phylum Arthropoda include the following.
- The body is segmented, triploblastic, and bilaterally symmetrical.
- They are organised at the organ system level.
- The body is divided into three sections: the head, the thorax, and the abdomen.
- They have a free-flowing circulatory system.
- A pair of compound eyes can be found on the head.
- Chitin is used to make the exoskeleton.
- Terrestrial Arthropods excrete via Malpighian tubules, whereas aquatic Arthropods excrete via green glands or coaxal glands.
- They are unisexual, with either external or internal fertilisation.

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