1. A radioisotope has a half-life of 1 hour. If a sample initially contains 100mg of this isotope, which one of the following correctly gives the amount of the radioisotope
remaining after 2 hours have passed? (1 point)

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