Answer:
Identify how the physical barriers of the immune system protect the body against pathogens?
skin contains tightly packed cells
•skin is tough, flexible, and waterproof
Explanation:
To put it simply: Sandpaper
The answer is Heredity! :)
- rock salt and gypsum: evaporation- dolostone: chemical replacement- chert and iron-rich formations: precipitation
You can see if there’s pollution, if the ecosystem is unbalanced or balanced, and you can identify the animals that call the ecosystem home.
Hope that helps
