Answer:
parasitism
Explanation:
In evolutionary ecology, parasitism is a symbiotic relationship between species, where one organism, the parasite, lives on or in another organism, the host, causing it some harm, and is adapted structurally to this way of life.
Answer: Adaptation
species adapt to their environment
During anaphase, sister chromatids are pulled to opposite poles by the spindle fibers in preparation for cleavage.