Q: Like the other outer planets, neptune has rings of ice and what? Read this paragraph and choose the correct option from the provided answers: Like the other outer planets, Neptune has rings of ice and dust. These rings are much thinner and fainter than Saturn's. Neptune's rings may be unstable. They may change or disappear in a relatively short time. Choices: - gas - mercury - glass - dust A:
dust

Q: Are the majority of archaea chemotrophs or photosynthetic? Read this paragraph and choose the correct option from the provided answers: Most archaea are chemotrophs and derive their energy and nutrients from breaking down molecules in their environment. A few species of archaea are photosynthetic and capture the energy of sunlight. Unlike bacteria, which can be parasites and are known to cause a variety of diseases, there are no known archaea that act as parasites. Some archaea do live within other organisms. But these archea form mutualistic relationships with their host, where both the archaea and the host benefit. In other words, they assist the host in some way, for example by helping to digest food. Choices: - photosynthetics - neither - autotrophs - chemotrophs A:
chemotrophs

Q: Q: What is the closed circulatory system of humans and other vertebrates called? Read this paragraph and choose the correct option from the provided answers: Choices: - digestive system - reproductive system - respiratory system - cardiovascular system A:
A: cardiovascular system

Question: Q: What water is about 3.5% salt? Read this paragraph and choose the correct option from the provided answers: You know that ocean water is salty. How salty is it? What is the salinity of seawater? Average seawater is about 3.5% salt. The amount is different if there is a nearby source of freshwater. It is also different if there is a lot of evaporation in an area. How do you think these things affect seawater salinity? Seawater also contains other substances like sugars, acids, bases, and organic molecules. 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 ___________? Read this paragraph and choose the correct option from the provided answers: Summary The concentration of a substance is the quantity of solute present in a given quantity of solution. Concentrations are usually expressed as molarity, the number of moles of solute in 1 L of solution. Solutions of known concentration can be prepared either by dissolving a known mass of solute in a solvent and diluting to a desired final volume or by diluting the appropriate volume of a more concentrated solution (a stock solution) to the desired final volume. Choices: - structure - mixture - salutation - solution A:
**Answer**
solution

*Question*
Q: What can happen spontaneously or as a result of mutagens in the environment? Read this paragraph and choose the correct option from the provided answers: Many mutations are not caused by errors in replication. Mutations can happen spontaneously, and they can be caused by mutagens in the environment. Some chemicals, such as those found in tobacco smoke, can be mutagens. Sometimes mutagens can also cause cancer. Tobacco smoke, for example, is often linked to lung cancer. Choices: - lesions - combustion - traits - mutations A:
**Answer**
mutations