What type of fossil will reveal the skin color of a 90 million year old frog?

Is a cobra an amphibians? What characteristic us used to divide aquatic biomes into three zones? Where do blue spotted salamanders live? Is a frog a decomposer producer or consumer? Does a frog have an exoskeleton or an endoskeleton and why? How long is a frog's duodenum? What color makes pink and purple? What is the function and system of a frogs spleen? What is the system of the liver in a frog? What are the part of the frogs circulatory system? What contains the crista ampullaris in the ear? How many atria are in a frog? What is the diet of the Magnificent Tree Frog? How did tree frogs get their name? Is there anything you could float in the pool that would work to save frogs and small animals from drowning? How do you eradicate cane toads? What are the adaptations of the red eyed tree frog? Do Louisiana have poison dart frog? Where can you find pictures of tree frogs? What does a frog look like as it grows?