I need help with this science test

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

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above