The graph of a function $f$ is concave downward at the point $(c,f(c))$ if $f'(c)$ exists and if for all $x$ in some open interval containing $c$, the point $(x,f(x))$ on the graph of $f$ lies below the corresponding point on the graph of the tangent line to $f$ at $c$. This is expressed by the inequality $f(x).
These 10 facts about space will blow your mind. Melodrama is a genre of theater in which music, played underneath or between delivered lines, emphasizes and exaggerates characters or the plot, making the story more emotional.ontemporary Use. In contemporary society, the term melodrama has gained many negative connotations and is associated with excessive action or emotion that looks unrealistic. Even so, some productions still fit into the genre. An example from film is Moulin Rouge (2001).
When the guard cells take in potassium ions, water diffuses into the cells by osmosis. Osmosis is the movement of water from an area of low concentration of solute (dissolved substance) to an area of high concentration of solute. When the water enters the cells, they swell and become bowed. This causes the guard cells to bend away from each other, thereby opening the stomata. Conversely, when guard cells lose potassium ions, water diffuses out of the cells by osmosis.