In astronomy, the concept of the Goldilocks Zone applies to planets that exist a certain distance from their sun. These planets orbit at a distance that might create ideal conditions for liquid water and life to exist. They are not too close to their sun, which would make it too hot for liquid water to exist, nor are they too far, which would make it too cold for liquid water to form. Consider the savanna in West Africa. How was this region a type of Goldilocks Zone for early human inhabitants? Explain your answer.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

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these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.