What life process is affected when the integumentary system detects external changes in the environment

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Which statement about the pancreas is not true? a. it is an endocrine organ in the abdomen. b. it release chemicals into the digestive system. c. it releases insulin to increase glucose levels. d. it release hormones into the bloodstream.

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