Answer: The circulatory system and the respiratory system.
Explanation:
Gas exchange between tissues and the blood is an essential function of the circulatory system. In humans, other mammals, and birds, blood absorbs oxygen and releases carbon dioxide in the lungs. Thus the circulatory and respiratory system, whose function is to obtain oxygen and discharge carbon dioxide, work in tandem.
Answer:
The answer would be C. mouse.
Explanation:
This is because it has more than one cell. A. Bacterium is unicellular, along with an amoeba and paramecium because they are basic units of life, with only a single cell.
Answer:
cells connecting to each other in colonies and communicating.
Explanation:
Fatty acids that have double bonds within the carbon chain (and therefore fewer hydrogen atoms).
