Ques:Q: What is the term for the class of ectothermic, four-legged vertebrates that produce amniotic eggs? Read this paragraph and choose the correct option from the provided answers: Reptiles are a class of ectothermic, four-legged vertebrates that produce amniotic eggs. They include turtles, crocodiles, lizards, and snakes. Reptiles were the first vertebrates to live full time on land, and they evolved many terrestrial adaptations. Choices: - mammals - Turtles - amphibians - reptiles A:

Ans:reptiles
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Ques:Q: Producers, primary consumers, higher-level consumers, and decomposers are levels in what? Read this paragraph and choose the correct option from the provided answers: Food Chains and Food Webs A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another; the levels in the food chain are producers, primary consumers, higher-level consumers, and finally decomposers. These levels are used to describe ecosystem structure and dynamics. There is a single path through a food chain. Each organism in a food chain occupies a specific trophic level (energy level), its position in the food chain or food web. In many ecosystems, the base, or foundation, of the food chain consists of photosynthetic organisms (plants or phytoplankton), which are called producers. The organisms that consume the producers are herbivores: the primary consumers. Secondary consumers are usually carnivores that eat the primary consumers. Tertiary consumers are carnivores that eat other carnivores. Higher-level consumers feed on the next lower trophic levels, and so on, up to the organisms at the top of the food chain: the apex consumers. In the Lake Ontario food chain, shown in Figure 20.4, the Chinook salmon is the apex consumer at the top of this food chain. Choices: - food model - energy chain - food flowchart - food chain A:

Ans:food chain
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Ques:Q: Name the bacteria that make food through photosynthesis and release oxygen into the air? Read this paragraph and choose the correct option from the provided answers: Bacteria called cyanobacteria are very important. They are bluish green in color (see Figure below ) because they contain chlorophyll (but not chloroplasts, of course). They make food through photosynthesis and release oxygen into the air. These bacteria were probably responsible for adding oxygen to the air on early Earth. This changed the planet's atmosphere. It also changed the direction of evolution. Ancient cyanobacteria also may have evolved into the chloroplasts of plant cells. Choices: - fusobacteria - phytoplankton - algae - cyanobacteria A:

Ans:cyanobacteria
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Ques:Q: What kind of muscle relationship generally produces back-and-forth movement of a body part? Read this paragraph and choose the correct option from the provided answers: Choices: - complementary muscles - cooperative muscles - synchronized muscles - antagonistic muscles A:

Ans:
antagonistic muscles
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