Banded snails have thrived as a species because of variability. They are found in a variety of colours, including brown and yellow. Explain how the colour of the shell has allowed the species to be so successful. Be specific.

How does variation in the individual members of a species contribute to the survival of the entire species?

A population of goats lives on a mountaintop. Half of the goats have an adaptation to extreme cold, while the other half only have an adaptation to extreme heat. If there is a sudden snowstorm, what will the next generation of goats be likely to have an adaptation for? Explain.