Q: What is the term for a galaxy that is a rotating disk of stars and dust? Choices: - cosmic galaxy - nebula - Milky Way - spiral galaxy A:
spiral galaxy

Q: What happened to earth's species during the permian period? Choices: - evolution - duplication - division - mass extinction A:
mass extinction

Q: Through what method or methods of fertilization do amphibians sexually reproduce? Choices: - asexual or sexual - mitosis and meiosis - spawning or budding - external or internal A:
external or internal