16 A marine ecosystem is represented below. Top carnivores Sunlight Herbivorous consumers Primary producers 1st-level carnivorous consumers 3rd-level carnivores 2nd-level carnivores Sharks, dolphins, albatross Squid Larger fish 5 Juvenile stages of fish, jellyfish, crustaceans, and sea stars Zooplankton and cockles Phytoplankton and seaweed 4 3 2 1 What is lost to the environment at each of the trophic levels of this ecosystem? F Nutrients from the soil G Living space for the organisms H Food sources J Heat Decomposers

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Animal Behavior

Animal behavior can be defined as all the things that animals do. In response to a stimulus, an animal performs a certain fixed action pattern, or FAP, of behavior. This response occurs to make the animal more adaptable to change. So, behavior is generally a stimulus-oriented response. A behavior is an expression of the capabilities of the nervous system. A stimulus is determined by the environment, while the nervous system determines a response.