Answer:
Answer is 3. Hope this helps!
Explanation:
They both deal with diseases just that pathogens cause disease while antibodies fight against disease
A hypothesis<span> is an idea that </span>can be tested<span> by an </span>experiment<span>-These ideas are based upon a person's </span>observations and<span> previous knowledge or experience. </span>
Well all animals are known for their characteristics so are placed in specific groups that match with their characteristics. Hope this helped :)
Answer:
Gas exchange occurs at two sites in the body: in the lungs, where oxygen is picked up and carbon dioxide is released at the respiratory membrane, and at the tissues, where oxygen is released and carbon dioxide is picked up.
Explanation:
