Darwin wrote many of the premises of 'the theory of evolution by natural selection' by noting differences in the of closely related while studying in the galapagos islands.

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated

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.