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Question

Which one is the biggest phylum in regard to the number of species?

A
Protozoa
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B
Platyhelminthes
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C
Arthropoda
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D
Chordata
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Solution

The correct option is B Arthropoda
Arthropoda is by far the largest phylum in the animal kingdom. It includes insects, lobsters, mites, crabs etc. A recent estimate of the number of arthropods on Earth today is 3.7 million species. It includes animals with jointed limbs and an exoskeleton made up of chitin.

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