Q: Q: X and y are the labels of what specialized human chromosomes? Choices: - carb chromosomes - exotic chromosomes - protein chromosomes - sex chromosomes A:
A: sex chromosomes

Q: Q: Many observatories are built on high mountains to avoid interference from what? Choices: - airplanes - artificial light - animal life - the atmosphere A:
A: the atmosphere

Q: Q: At what time of the year can tornadoes occur? Choices: - winter - spring - summer - any A:
A: any

Q: Q: Solids and liquids are phases of matter that have their own unique what? Choices: - volumes - temperatures - masses - properties A:
A: properties