Can carbohydrate be used to create cell walls

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.

What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent  

Some plants have reproductive structures that them reproduce using natural forces or animals. how does the reproductive structure shown here ensure the reproductive success of plants?