Medications can be tested on cell cultures instead of being injected into patients unnecessarily.
Cancer cells continue to grow in the cultures uncontrollably allowing scientists to test multiple medications on the cancer cells.
ANSWER: C, the continents were at one time joined together.
REASONING: Alfred Wegener was the first person to propose the scientific theory of Continental Drift. Continental Drift is a theory that supposes all the continents were at one time joined together as one large land mass. The mechanisms of continental drift can be explained by Plate Tectonics.
Haemoglobin takes oxygen and gives it to the cells thus hemoglobin is free to carry more oxygen.
Answer:
False.
Explanation:
Looking at the diagram I don't see how every point is mirrored. The one of the head is not for sure.
