The first organism in the food chain is the producer.
Examples of physical changes in properties are melting, transition to a gas, crystallization, etc
The most abundant element is oxygen...found in the crust and in the atmosphere.
<span>The spherical object within a cell that controls its activity is the nucleus. The nucleus is the spherical organelle inside the cells. The genetic material can be found within the nucleus. So, the genetic information of the cell is inside the nucleus and therefore the nucleus can the activity of the cell.</span>
Answer: D. a gas molecule that is made of three oxygen atoms