generalist species, because humans are mammals which mammals are not a narrowed down species.
Answer:
Pulmonary arteries carry the blood to your lungs, where it receives oxygen. Pulmonary veins move the blood oxygen-rich blood to the left side of your heart.
Add 7+7
subtract 12
how many is left is your answer.
I hope I helped!~
It is B, as one organism is benefiting, while the other is harmed
