|Space||Pause/Play video playback|
|Enter||Pause/Play video playback|
|m||Mute/Unmute video volume|
|Up and Down arrows||Increase and decrease volume by 10%|
|Right and Left arrows||Seek forward or backward by 5 seconds|
|0-9||Fast seek to x% of the video.|
|f||Enter or exit fullscreen. (Note: To exit fullscreen in flash press the Esc key.|
|c||Press c to toggle captions on or off|
1-3. Click the button below to answer questions 1-3. Remember to refer to the video if you are not sure of your answers.
4. When you compare the DNA of two closely related organisms, would you expect their DNA to be more similar or less similar than the DNA of two distantly related organisms? Explain your answer.
5. Fossils almost never contain DNA. So how can we know how closely or distantly related fossil organisms are to living organisms?