They’re cell walls. They provide structure and support for the plant and fungi cells.
The tricuspid valve has three cusps that are essential components of the valve. (Hence "tri-" in tricuspid. ) The semilunar valve is called semilunar because each semilunar valve has cusps in the shape of half moons. Hope this helps to contrast their structure!
Answer:
A. Wood
Explanation:
Natural gas, oil, and coal are all made from fossils. Wood is a non-renewable resource/
