What was the greatest step toward the discovery of cells?

Me if the environment changes, what is the first thing a species will do to survive? question options: the species will suddenly move from the area the species will adapt to the changes the species will change the environment back the species cannot survive a change in the environment

Which could be a pathway of food through an ecosystem

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.