Q: A notochord has in common with what vertbrate structure?


Read this paragraph and choose the correct option from the provided answers:

Some invertebrates evolved a rigid rod along the length of their body. This rod is called a notochord. You can see the notochord in the tunicates in Figure below . The notochord gives the body support and shape. It also provides a place for muscles to attach. It can counterbalance the pull of the muscles when they contract. Animals with a notochord are called chordates. All of them are placed in Phylum Chordata. Some early chordates eventually evolved into vertebrates.

 Choices:

- trichord

- rib cage

- rip chord

- spinal cord


A:
spinal cord