The plasma/cell membrane is a phospholipid bilayer that is made up of mostly unsaturated fats.
Answer:
The answer is rocks.
Explanation:
Since the main source of phosphorus is found in rocks, the first step of the phosphorus cycle involves the extraction of phosphorus from the rocks by weathering.
Answer:
scientists disagree about the fossils from this time period. ... there is very little fossil evidence for this time period. there are too many fossils to name
