Identify the names of animals that lived on earth before dinosaurs. a) early horses b) dinosaurs c) armored fish d) trilobites

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

If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?

When a person is exercising the body needs to deliver increased amounts of oxygen to the muscles which component of blood ensures that the muscles will receive it