If a hypothesis is supported consistently by different observations or experiments, it may be advanced to the level of a(n) <u>theory</u>.
Answer:parasitism
Explanation:
the leeches benefit but cause the fish harm I’m not sure if this is the type of answer you needed hopefully it helps
Macrophages kill the cellular debris of the pathogens that are killed by the immune system. They are a type of white blood cells, and kill anything which does not have the proteins that are specific to the healthy cells of the body. Cancer cells, foreign substances, and microbes are engulfed by them.
I think the answer is B> opposes the effects of the sympathetic division
Bone marrow transplant has been used successfully to treat diseases such as leukemias, lymphomas, aplastic anemia, immune deficiency disorders, and some solid tumor cancers
