Answer:
Explanation: by interacting with the excretory system
 
        
             
        
        
        
True they are in the heart as well as the rest of your body
        
             
        
        
        
Explanation:
The discoveries indicates that the rocks were formed over millions of years ago due to the age of fossils they contain. 
Fossils are the preserved remains of life found in rocks. Most fossils are used in relative dating of rocks. 
- Dinosaurs are extinct organisms that once lived in the Mesozoic. This was about 100 million years ago. 
- Tool man also grazed the surface of the earth just a few thousands to a million years.
- We are able to find their fossils in rocks because they have lived in some certain geologic periods. 
- Here we are using the fossils to date the rock and this is called relative dating 
learn more: 
Fossils brainly.com/question/7382392
#learnwithBrainly
 
        
                    
             
        
        
        
Yes they will have to learn about the other branches of biology so that they can have more background knowledge on evolution and can also have facts to back the fact that evolution is true