How does the composition and structure of the atmosphere ensure the protection of the earth

What came first egg or chicken? and is tomato a vegetable or a fruit?

Residential construction is expanding in florida, the expansion has caused fragmentation of habitats, one of the results of the increased construction is a decrease in the number of large predators such as the coyote, black bear and pool panther, which will be the most immediate local result of this fragmentation? 1)large predators will become extinct 2)decrease in middle sized predators 3)increase in population of top carnivores 4)increase in population of prey species

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.