Answer:
so like a plant that loses leaves in the fall does so because it won't have sun in the winter. then they grow back. it adapts to the environment
Answer:
"Brachiopoda"
Drosal and ventral valves; Individuals resemble clams; May have no anus
"Bryozoa"
Possesses a chitinous zoecium; Anus opening near mouth; Colonies resemble moss
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!
