the 3 survivorship curves. How is a food chain different from a food web? Why is transfer of energy in an ecosystem referred to as energy flow, not energy cycling? Explain the single greatest threat to species biodiversity today, citing 2 examples. Identify four derived characters that all chordates have at some point in their life. Is it accurate to define homeostasis as a constant internal environment? Explain. Distinguish the overall structure of a gastrovascular cavity from that of an alimentary canal. Which division of the autonomic nervous system would likely be activated if a student learned that an exam, they had forgotten about would start in 5 minutes? Explain. Explain why a physician might order a white blood cell count for a patient with symptoms of an infection. Why is an internal location for gas exchange tissues advantageous for terrestrial animals?

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Reproductive system infection

The biological process through which parents produce new children is called reproduction. A reproductive system is a group of internal and external organs that collaborate to allow males and females to reproduce. Many experts believe that the reproductive system is one of the most important systems in the body due to its crucial function in the survival of the species. Among the body's basic systems, the reproductive tract is the one that differs the most between sexes, and it is also the only one that does not operate until puberty.