Answer:
Oxygen is inhaled so that Dioxide can be exhaled, that is just how breathing functions.
Explanation:
We require this system for our survival.
Normally tree rings will disappear, damage, or go missing when the tree doesn't have enough nutrients, another factor that contributes to that is drought.
Answer:
monomers
Explanation:
The monomers combine with each other using covalent bonds to form larger molecules known as polymers. In doing so, monomers release water molecules as byproducts.