Which of the following invertebrate phylum consists of the most abundant species on planet Earth:
Correct answer: C. Arthropoda
- A. Porifera
- B. Cnidaria
- C. Arthropoda
- D. Mollusca
Explanation
Of all animals it is estimated that well over 90% are invertebrates. Of all invertebrates, arthropods are by far the most numerous.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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