Answer:
Ecosystem, community, species, population
Explanation:
Answer: As in other higher vertebrates, the frog body may be divided into a head, a short neck, and a trunk (see Vertebrates). The flat head contains the brain, mouth, eyes, ears, and nose. A short, almost rigid neck permits only limited head movement. The stubby trunk forms walls for a single body cavity, the coelom.
Explanation:
Outputs : Oxygen
Inputs: Sunlight;Carbon dioxide;Water
Answer:
sexually transmitted disease
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