1. The notochord is found in what stage of a chordates life?
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2. In humans and apes the post-anal tail is only present in what stage?
3. In some invertebrate chordates pharyngeal slits are used for
- Filter feeding
- Gas exchange
4. What is the Coelom
- he space between two layers of mesoderm – the body cavity
- The structure of the spinal column
5. In most adult vertebrates the notochord is replaced by what?
- Vertebral column (spine)
- Rib cage