How does the frogs green color help it to survive?

Answer 1

Natural selection helps all living things to survive in the same way as frogs but here is an example. This is not a true story but a hypothetical situation (pretend story). Suppose there are green frogs living in an area where there is a lot of green weed in the pond. Some of the frogs are caught and eaten by birds and some are lucky and escape. Suppose now the pond is invaded by a reddish coloured weed. The frogs now become very easy for the birds to see and most get eaten. Lucky for the frogs, they are all of slightly different colours. Some are just a tiny bit redder than others. These frogs are easy to see but there is a slightly better chance they will get away. This means that the slightly redder frogs will survive meaning their offspring will be slightly redder than the average for the previous generation. They will still be easy to spot by the birds but will have a slightly better chance than their parents. This process continues with the frogs becoming redder and redder with each generation. Eventually the frogs will turn red. Some will still get caught but enough will survive to restore the balance. During the industrial revolution in Europe, cotton moths turned from white to black in the space of fifty years. Before the industrial revolution they were white because they lived on white barked trees. Because of the soot from the factories they had to turn black to survive just like the frogs in the above story.

Answer 2

The green color helps the frog blend in to it's environment, and thus keep it safe from predators.