Watch this short video about the “ingredients” for natural selection.
What three things MUST occur for natural selection to happen? (Use complete sentences)
Watch this introductory video.
If organisms survive and reproduce at higher rates, they have higher _____.
Name two sources of variation in populaions:
Explain your answer for the question above.
Watch this video about adaptation.
Why do some populations of organisms look similar over long periods of time?
Give an example from the video for question 6.
Why do some populations of organisms look different over time?
Give an example from the video for question 8.
Click this link and examine these tiles (the ones NOT marked out):
Ancestry of Land Plants, Mouth or Butt First?, Tiktaalik, The Ant-Wasp, and Dino-Birds.
For each tile, list the type(s) of evidence used by scientists when studying the evolution of organisms.
Traits that vary in populations can be neutral, negative, or positive. Which is/are likely to increase in frequency in populations?
Ancestry of Land Plants?
Mouth or Butt First
Tiktaalik
The Ant-Wasp
Dino-Birds
