Question: Answer the following question given this paragraph: One trait invertebrates like the sponge and tarantula share is lack of a backbone. In fact, they don't have any bones at all. These are defining traits of all invertebrates. Some invertebrates have a skeleton, but it isn't made of bone. Many other traits of invertebrates show considerable diversity. Q: What traits do the sponge and tarantula share? Choices: - number of eyes - number of legs - lifespan - lack of backbone A:
Answer:
lack of backbone