Glacial periods are demonstrated by large drops in temperature and CO2 followed by a rapid rise. How many major glacial periods have there been in the last 400,000 years?

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

Set comes up with for examples of sound waves ocean wave light wave and hand wave which of tonys examples is not an actual scientific wave

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.