Unit 7: Evolution IntroDoc

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14 questions

Watch this introductory video.

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 video about adaptation.

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.

Unit 7: Evolution IntroDoc

Unit 7: Evolution IntroDoc

What three things MUST occur for natural selection to happen? (Use complete sentences)

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.

What three things MUST occur for natural selection to happen? (Use complete sentences)

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.

If organisms survive and reproduce at higher rates, they have higher _____.

Name two sources of variation in populaions:

Traits that vary in populations can be neutral, negative, or positive. Which is/are likely to increase in frequency in populations?

Explain your answer for the question above.

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.

Ancestry of Land Plants?

Mouth or Butt First

Tiktaalik

The Ant-Wasp

Dino-Birds