the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.
Epistasis is the term used to
describe the gene-to-gene interaction in which the action of one gene modifies
the expression of a different gene. Epistasis occurs due to the relationship
between or within genes which leads to different non-linear effects.
The snakes nutrition is carnivores based. The frogs nutrition is also carnivores based (feeds on other animals), but in this situation the snake is the predator and the frog is the prey