Q: Like the other outer planets, neptune has rings of ice and what? Choices: - gas - mercury - glass - dust A:
dust

Q: Are the majority of archaea chemotrophs or photosynthetic? Choices: - photosynthetics - neither - autotrophs - chemotrophs A:
chemotrophs

Q: Q: What is the closed circulatory system of humans and other vertebrates called? Choices: - digestive system - reproductive system - respiratory system - cardiovascular system A:
A: cardiovascular system

Question: Q: What water is about 3.5% salt? Choices: - glacial water - fresh water - spring water - seawater A:
Answer: seawater

*Question*
Q: The concentration of a substance is the quantity of solute present in a given quantity of ___________? Choices: - structure - mixture - salutation - solution A:
**Answer**
solution

*Question*
Q: What can happen spontaneously or as a result of mutagens in the environment? Choices: - lesions - combustion - traits - mutations A:
**Answer**
mutations