Which activity occurs when a flowering plant reproduces? Egg cells move near the petals to catch the pollen. Sperm cells swim through the plant stem to reach the egg cells. A fertilized egg forms an embryo that is stored inside a seed. Pollen grains travel into the fruit to fertilize the embryo.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called