Acoastal forest was home to a type of burrowing rodent that was not found anywhere else in the world. a year ago, a species of large predator moved to the forest, but the rodents were able to escape by hiding in narrow underground tunnels. recently, a hurricane flooded most of the forest. a few days later, scientists studying the area found that no members of this species remained. which best describes why the species became extinct? a natural disaster killed off the population by flooding their habitat. large predators moved to the area where the rodents lived. they had no genetic variation so they could not adapt to changes in the habitat. they were not big enough to compete with the new, larger species for food.

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.