Question: Q: What kinds of neutron stars emit radiation in pulses? Choices: - quasars - red giants - dwarf stars - pulsars A:
Answer: pulsars

Question: Q: What bodily system is primarily responsible for fighting pathogens in the body? Choices: - digestion - Cardiovascular - Muscular - immune A:
Answer: immune

Question: Q: When pumping blood, the hearts of animals with very long necks must overcome what force? Choices: - erosion - evolution - friction - gravity A:
Answer:
gravity