Answer:
The oxygen atoms have electrons more often than hydrogen.
Explanation:
The lowest and thickest layer of the atmosphere is troposphere
I took this, I believe that it was dictation. I might be wrong though.
I believe Formed in our bones, hydroxyapatite crystals are mineral complexes comprised of calcium and phosphorus. The hardness and rigidity of bone is due to the presence of mineral salt in the osteoid matrix, which is a crystalline complex of calcium and phosphate. Calcified bone contains about 25% organic matrix, 5% water and 70% inorganic mineral.
Plants breathe through the mangroves by aerial roots
