Explain how to identify a starting position on a line

Ineed the definitions of all of these words nasap i will give 1o points to whoever awnsers

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.

Are gametes exactly the same? explain why or why not?