Does anyone know questions 32-35? i need help on them please.

Which experiment would most likely contain experimental bias

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

In which of the following relationships is one organism always benefited while the other organism is always harmed