Which of the following taxa contains all animals?Question 4Select one:a.Metazoab.Vertebratac.Poriferad.Cnidaria

To determine which taxon contains all animals, let's analyze the given options:

1. Metazoa: This is the taxonomic group that includes all animals, comprising all multicellular organisms. It encompasses both vertebrates and invertebrates.

2. Vertebrata: This group is a subphylum within the Metazoa. It includes all animals with backbones, such as mammals, birds, reptiles, amphibians, and fish. However, it does not include invertebrates (like insects, mollusks, etc.).

3. Porifera: This is the phylum that includes sponges, a group of simple aquatic animals. While they are animals, Porifera does not encompass all animal taxa.

4. Cnidaria: This phylum includes jellyfish, corals, and sea anemones. Again, it does not include all animals, as it is limited to this specific group.

Conclusion:

The correct answer is a. Metazoa, as it is the broadest taxonomic category that includes all animals, both vertebrates and invertebrates.