Bone found at the lower-back area of the cranium
Answer: A.) The nitrogen cycle recycles nitrogen through an ecosystem, making it available to all organisms.
Explanation: Nitrogen is an essential nutrient for plants and a significant component of proteins, which all animals need to grow, reproduce and survive. The nitrogen cycle converts nitrogen into compounds that plants and animals can use.
Carbon dioxide and water
<span>C6</span><span>H12</span><span>O6</span>+<span>O2</span>→<span>CO2</span>+<span>H2</span>O+<span>energy</span>
The sewing needle should float in the water if placed on a horizontal angle if I remember properly.
I hope this helps in some way.
Rocks are abiotic
(Soil?) is made of both abiotic and biotic materials
Sea shells are biotic
