Q: What consists of thylakoid membranes surrounded by stroma? Read this paragraph and choose the correct option from the provided answers: A chloroplast consists of thylakoid membranes surrounded by stroma. The thylakoid membranes contain molecules of the green pigment chlorophyll. Choices: - a photon - a nucleus - a stem - a chloroplast A:
a chloroplast

Q: What is the force of attraction between fundamental particles called quarks, called. Read this paragraph and choose the correct option from the provided answers: The strong nuclear force is a force of attraction between fundamental particles called quarks, which have a type of charge called color charge. The strong nuclear force is transferred between quarks by fundamental force-carrying particles called gluons. Both protons and neutrons consist of quarks. The exchange of gluons holds quarks together within a proton or neutron. Excess, or residual, strong force holds together protons and neutrons in the nucleus. The strong nuclear force is strong enough to overcome the electromagnetic force of repulsion pushing protons apart. Both forces are represented in the Figure below . Choices: - magnetism - gravity - weak nuclear force - strong nuclear force A:
strong nuclear force

Q: What process would be impossible without some variation in the inherited traits of organisms within a species? Read this paragraph and choose the correct option from the provided answers: There is some variation in the inherited traits of organisms within a species. Without this variation, natural selection would not be possible. Choices: - environmental selection - darwin's selection - characteristic selection - natural selection A:
natural selection