Q: Q: What system is responsible for defending your body against sickness? Choices: - nervous system - circulatory system - digestion system - immune system A:
A: immune system

Q: Q: What explains why two different species cannot occupy the same niche in the same place for very long? Choices: - evolution - natural selection - survival exclusion princple - competive exclusion princple A:
A: competive exclusion princple

Q: Q: What are the three types of symbiotic relationships? Choices: - pledgism, truism, greenism - symbiosis , communalism , parasitism - altruism, conservatism, communalism - mutualism, communalism, parasitism A:
A: mutualism, communalism, parasitism

Q: Q: Boiling points increase with which kind of mass? Choices: - lipid mass - universal mass - protons mass - molar mass A:
A: molar mass