Question: Q: What do vertebrates possess that is made up of repeating bony units? Choices: - notochord - skull - spinal cord - vertebral column A:
Answer: vertebral column

Question: Q: Where do lightnings build up? Choices: - stratosphere - air - troposphere - clouds A:
Answer: clouds

Question: Q: Defecating, urination, and even childbirth involve cooperation between the diaphragm and these? Choices: - heart muscles - skeletal muscles - lung muscles - abdominal muscles A:
Answer:
abdominal muscles