Animal Camouflage

Which is often the most important factor for what the camouflage looks like?

There would be no point in an animal replicating the color of its surroundings if its main predator were which of these?

Which animal is known as the ermine in winter, when it changes its coat to white to blend in with the Arctic winter?

Many animals have developed special adaptations that let them change their coloration as their surroundings change. Which of these is a natural occurrence which would lead to this type of change?

In many reptiles, amphibians, and fish coloration is determined by biochromes in living cells. Biochromes may be in cells at the skin's surface or in cells at deeper levels. What are the deeper-level cells called ?

The most famous color-changer is the chameleon. Chameleons tend to change their skin color when their mood changes, not when they move into different surroundings.

In many ecosystems, smaller poisonous animals develop a bright coloration - predators learn to steer clear of these colors, lest they get a mouthful of venom. Over time, other, non-poisonous species may develop the same coloration, cashing in on the nasty reputation of the poisonous species. This adaptation is known by which name?