Hydrogen is in a state of matter as a gaseous form. (so the answer is gas)
Excretory System is the wastes that gets out of your body by sweat, gas and other types of wastes.Urinary system rids the blood of wastes produced by the cells.
To determine if your hypothesis was correct for future reference
Answer:
Both flowers and runners help a plant to reproduce.
Explanation:
Both flowers and runners help a plant to reproduce. While a flower help in sexual reproduction, a runner helps in asexual reproduction.
A flower has both male and female gamete at one place. When the pollen grains with in a flower reaches the female ovary, a new seed is produced which has the potential to develop into new plant. In case of runner (which is a stem), the tip of the stem has the potential to grow into a new plant
That is a chemical change or reaction.