Q: If resistors can prevent a light bulb from turning on, then what could prevent a light bult from turning on? Answer choices: - sensory neurons - herbicide - A resistor - focusing a lens - evaporation - heat energy - heating liquids - energy barrier
A: A resistor

Q: If mutations allow for natural selection to occur, then what enables natural selection to occur? Answer choices: - environment - mutations - competition - relocation - Darwin - evolutionary development - root growth - research
A: mutations

Q: If ultraviolet light can be painful and dangerous, then what can be painful and dangerous? Answer choices: - Brutal temperatures - smoking cigarettes - Pesticides - ultraviolet light - weathering - hyperthyroidism - nutrients - oxygen
A: ultraviolet light

Q: If gene sequences can bring amino acids in the correct sequence, then what can bring amino acids in the correct sequence? Answer choices: - body morphing - Organic compounds - flow of electrons - acid sequences - gene sequences - A computer - gene markups - A Greek letter
A: gene sequences