Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Input: Passage: Invertebrates are animals that lack a vertebral column, or backbone. All the phyla in Table above , except the Phylum Chordata, consist only of invertebrates. Even the Phylum Chordata includes some invertebrate taxa. Invertebrates make up about 95 percent of all animal species. Answer: 95 percent
Output:
Invertebrates make up what percentage of all animal species?