The answer you are looking for is called Serotonin. Please put this as the brainiest answer thank you and hope this helped.
The Punctuated Equilibrium theory proposes that a specie that appears in the fossil record will become stable. To support this theory, a fossil record serves as an evidence which includes transitional fossils. Transitional fossils refers to the remains of an organism that still exhibit traits to both the ancestral and descendant group.
A- non-native species can have positive and negative affects
The graph which best represents this phenomenon is graph C.
The result of disruptive selection is the selection of the most extreme phenotypes/genoypes, and the decrease of the middle terms.