<u>Answer:</u>
Natural: mountains, rocks, soils, ecosystems, etc.
Manmade: artificial streams or tributaries, roads, farms, etc.
<u>Explanation:</u>
A watershed a geographical area that drains all forms of surface water (rainfall or snowmelt) from <u>higher altitudes</u> (e.g. top of mountains) to the <u>lower altitude</u> (e.g. rivers) thus draining the water to the same place.
Since watershed is a large area, it often comprises both natural and manmade features. Manmade features are typically the roads or (small) cities that are developed by humans in the hilly areas. On the other hand, natural features are developed due to the natural action of hydrogeological and/or meteorological conditions over the course of longer time periods.
Answer:
lipids
Explanation:
Lipids are a family of organic compounds that are mostly insoluble in water. Composed of fats and oils, lipids are molecules that yield high energy and have a chemical composition mainly of carbon, hydrogen, and oxygen. Lipids perform three primary biological functions within the body: they serve as structural components of cell membranes, function as energy storehouses, and function as important signaling molecules.
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A positively charged ion in the intracellular fluid is potassium. Potassium is one of the electrolytes dissolved in the body fluids and is the most abundant positively charged ion of the human body. It plays an important role in securing homeostasis and the proper function of cells.
Answer:
Life expectancy has steadily risen.
People live longer lives.
Answer:
C. The interaction between organisms