How did later discoveries change the model of Mendeleev's periodic table to what we accept today?

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

Will give ! ! widentify the advantages and disadvantages of renewable and nonrenewable energy resources.

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems