A mold is the cavity left behind in the rock after an organism's hard part has dissolved.
It is because convergent evolution represents the independent evolution of similar features in species that don't have the same ancestor. In this case filamentous body forms evolved independently, but have the same function: an adaptation for a nutrition of decomposers.
Answer:
<h2><u>Mitral </u><u>Valve</u></h2>
- <u>Mitral valve</u>, between the left atrium and left ventricle
