Organelles are specialized structures that perform various jobs inside cells. The term literally means “little organs.” In the same way organs, such as the heart, liver, stomach, and kidneys, serve specific functions to keep an organism alive, organelles serve specific functions to keep a cell alive.
The statement above is a false statement. For maximum photosynthesis, increased light does not have the greater effect than increased leaf surface area. Photosynthesis' temperature continues to increase true within its limitations.
You can tell that an organism is related to another organism by looking at their DNA. If they are similar, they are related. Another way to see if they look similar. For example, we are related to chimpanzees because we look similar and have similar DNA.