Q: Q: What mineral is made of one silicon atom and two oxygen atoms? Read this paragraph and choose the correct option from the provided answers: 5. Quartz is made of one silicon atom and two oxygen atoms. If you find a mineral and find that it is made of one silicon atom and one oxygen atom is it quartz?. Choices: - glass - pumice - cobalt - quartz A:
A: quartz

Q: Q: By breaking down wastes and remains of dead organisms, decomposers perform what function in an ecosystem? Read this paragraph and choose the correct option from the provided answers: Most prokaryotes get both energy and carbon from other living things. Many of them are decomposers. They break down wastes and remains of dead organisms. In this way, they help to recycle carbon and nitrogen through ecosystems. Choices: - reproduction - symbiosis - collecting - recycling A:
A: recycling

Q: Q: What is the change in a species over time? Read this paragraph and choose the correct option from the provided answers: Scientists do the same thing when they classify , or put into categories, living things. Scientists classify organisms not only by their physical features, but also by how closely related they are. Lions and tigers look like each other more than they look like bears, but are lions and tigers related? Evolutionarily speaking, yes. Evolution is the change in a species over time. Lions and tigers both evolved from a common ancestor. So it turns out that the two cats are actually more closely related to each other than to bears. How an organism looks and how it is related to other organisms determines how it is classified. Choices: - variation - phenomenon - transformation - evolution A:
A: evolution

Q: Q: Alveolar ducts and broncioles are developing parts of what organ system? Read this paragraph and choose the correct option from the provided answers: Weeks 1624 Once the respiratory bronchioles form, further development includes extensive vascularization, or the development of the blood vessels, as well as the formation of alveolar ducts and alveolar precursors. At about week 19, the respiratory bronchioles have formed. In addition, cells lining the respiratory structures begin to differentiate to form type I and type II pneumocytes. Once type II cells have differentiated, they begin to secrete small amounts of pulmonary surfactant. Around week 20, fetal breathing movements may begin. Choices: - nervous - immune - digestive - respiratory A:
A: respiratory