The answer is B. If a cell has a nucleus its a eukaryote
Enzymes are biological molecules (typically proteins) that significantly speed up the rate of virtually all of the chemical reactions that take place within cells. They are vital for life and serve a wide range of important functions in the body, such as aiding in digestion and metabolism.
Chemical Weathering<span> results from chemical reactions between minerals and Water. Water dissolves calcite </span>more<span> readily than it </span>does<span> feldspar, so calcite is considered a chemical reaction with water.
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Cell membrane is a semipermable, which means that certain molecules will be able to pass through the membrane. It is contains phospholipids. But for smaller molecules such as CO2 and Water, it can pass through the membrane through simple diffusion. Cell membrane controls the movement of the materials into and out of the cell.
The study of health and disease within a geographic context and from a spatial perspective is medical geography.
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