Oxygen is what animals need in order for Carbon Dioxide to be exhaled while breathing. This is part of what the Respiratory System does. Carbon also enters animals that are in contaminated environments such as living next to a factory or a polluted area.
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The conclusion to be drawn from the fact that secondary consumers do not digest the bones of their prey is that energy used to create bone mass often does not travel farther up the food chain . Explanation: ... No energy is required to form bones .
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Secondary consumers include owls, bears, lions and humans – along with many other organisms, and can be considered the predators in a given ecosystem. Many secondary consumers are carnivores, some of which are eaten by tertiary consumers.
