Which is used as a presumptive or preliminary field test for blood?

What are two examples of conduction that we use everyday

Which substance contains thylakoids? a) nadph b)atp c)stroma d)chloroplast

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.