A scientist is performing an experiment to determine the melting point of a new substance. Which action could increase the likelihood of obtaining accurate results?

Which event shows the pattern of coordinated stasis? a) the removal of geographic barrier united species that were previously reproductively isolated. b) major hurricanes and other weather variations destroyed regions of coastline ecosystems. c) the volcanic eruption of mount st. helens in 1980 spewed vast amounts of ash into the air. d) global cooling 2.8 million years ago resulted in dry grassland replacing wet forests in parts of africa.