What causes genetic variation in a population? environmental changes random mutations favorable adaptations

How did the miller-urey experiment impact the way scientists think about the origins of life? use what you know about the miller-urey experiments to discuss the factors needed for life to arise, and speculate on whether life could arise on another planet.

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm