Answer:haemoglobin
Explanation:
Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body.
A. genetically identical 2n somatic cells
Answer: Its A my friend, how it helps!.
Explanation: I just completed the Test.
They must preform photosynthesis so they can acquire energy and nutrition.
