7th Grade Science Final Study Guide Part II

Match it! Select the correct answer from the pull down...Good luck!

Which organ system contains two large sacs with the exchange of gases taking place in the alveoli?

When communities replace one another in an ecosystem after a forest fire, what kind of ecological succession does this represent?

If a paleontologist finds fossils of many different species existing in the same area at approximately the same time, the paleontologist can conclude that the ecosystem in this area had a high degree of -

The bands on a pair of chromosomes represent ?

In a food web, what does the arrows represent?

Which organisms are carnivores

Which of these best illustrates natural selection?

Where does a chemical reaction take place in the digestive system?