Q: What are interferons? Read this paragraph and choose the correct option from the provided answers: Figure 42.4 Interferons are cytokines that are released by a cell infected with a virus. Response of neighboring cells to interferon helps stem the infection. Choices: - T cells - oncogenes - pathogens - cytokines A:
cytokines

Q: Mitochondria are thought to have evolved from what kind of cells? Read this paragraph and choose the correct option from the provided answers: Mitochondria are thought to have evolved from ancient prokaryotic cells. Choices: - ancient ribosome - ancient phosphorylation - ancient matrix - ancient prokaryotic A:
ancient prokaryotic

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:
recycling

Q: Which metal is not solid at room temperature? Read this paragraph and choose the correct option from the provided answers: All metals except for mercury are solids at room temperature. Many metals are shiny, ductile, and malleable. Most are also good conductors of heat. Choices: - silver - aluminum - titanium - mercury A:
mercury