Answer:
Selective breeding is when a human or farmer in this case selects two plants or chickens with the best traits in order to get a good yield and quality for the products they are producing. I hope this 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.
Answer: = B
Explanation: It's a time consuming process .
