B.
Groups of similar cells that do a particular job.
Answer:
b. testing new conditions.......
Answer:
Answer is hemoglobin S.
Explanation:
Hemoglobin S is considered as an abnormal type of hemoglobin which a child can be inherited from the parents. This cause the red blood cells to have distinct shapes from their normal shape. The red blood cells will have a sickle shape which is different from their normal round disk shape.
They are the first species that could live on dry ground.
