What are pedicellariae?

Would really appreciate it, i have an idea but not completely sure

The picture showed normal blood cells which are around and sickle cells which appear much longer people with sickle-cell suffer from the sickle cell anemia which is inherited diseaseit is caused by a change in gene responsible for production of hemo goblin this type of change is known as an

This rapid change in species that rarely leaves behind fossil evidence is referred to as