The jawed fish and all other vertebrates are gnathostomes, which means they have

Are the earth's ocean floor and continents the same age geologically? why or why not?

If you want to double a batch of brownies you must have double the ingredients before you start cooking similarity a cell must double its contents including its dna prior to dividing

Which of your fossils are most likely heterotrophs? which of them are autotrophs? how do you know?