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Warm up 2/5

Last updated about 6 years ago

3 questions

1

1

1

Question 1

1.

Scientists hypothesize that tomatoes, eggplants and spinach have a recent common ancestor. If this is true, which best supports this hypothesis?

  These plants share all of the same organelles

 Gardeners use similar techniques to grow these plants. 

  The fossils of these plants are found in the same fossil layer.

 These plants share very similar DNA sequences.  

Question 2

2.

Which explanation would best explain the common ancestry between organisms that cannot swim in Alaska and Siberia?

  They have excellent adaptations for jumping

 Alaska and Siberia were once connected by a land bridge across the Bering Strait

 Because their climates are similar, organism on both sides of the water independently evolved analogous traits 

  The sudden appearance of mammoths in the fossil record. 

Question 3

3.

Scientists have collected data on the change in big toe length of humans and graphed it below. Which conclusion is supported by this information?

 Humans with mutations for smaller toe sizes are more fit than those with larger toe sizes.

 There has been no change in the allele frequencies affecting toe size over time 

 Humans with larger toe sizes are more fit than those with smaller toe sizes.  

 Humans with mutations for average toe sizes are more fit than those with toe sizes on either extremes. 