Variations in species help them to adapt themselves to that particular environment and give them a chance of survival. For example, thermophilic bacteria are variants that are resistant to extreme temperature. They have a chance of survival in high temperate zones while others die.
It disrupts homeostasis by putting our body in stress which isn’t good. It fills out alveoli with mucus and our bronchiole is inflamed with music. Besides, it shortens our breathe
