Chapter 2, section 3 Biogeography Pages 54-57

Discover Activity- page 54 How can you move a seed? How can you move a seed? Materials: corn kernels, shallow pan, water, straw and tape Materials: corn kernels, shallow pan, water, straw and tape How might seeds be moved from place to place? How might seeds be moved from place to place?

Biogeography What are some reasons that animals move from one place to another? What are some reasons that animals move from one place to another? ANSWER

Continental Drift Read page 55 Read page 55 What is Pangaea? What is Pangaea? Figure 10 shows a process that took hundreds of millions of years. Why does Australia have so many unique organisms? Figure 10 shows a process that took hundreds of millions of years. Why does Australia have so many unique organisms? terc/content/visualizations/es0806/es0806page0 1.cfm?chapter_no=08 animation of Pangea terc/content/visualizations/es0806/es0806page0 1.cfm?chapter_no=08 animation of Pangea terc/content/visualizations/es0806/es0806page0 1.cfm?chapter_no=08 terc/content/visualizations/es0806/es0806page0 1.cfm?chapter_no=08 Have North and South America been connected ever since the breakup of Pangaea? Have North and South America been connected ever since the breakup of Pangaea?

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Means of Dispersal Read page Read page Complete notes. Complete notes. What are some ways that organisms can be dispersed? What are some ways that organisms can be dispersed? When might seed dispersal not be beneficial? When might seed dispersal not be beneficial?

Answers When seeds are carried to an area where you do not want them to grow. When seeds are carried to an area where you do not want them to grow.

Limits to Dispersal Read pages Read pages Complete notes. Complete notes.

Question 1 What are 3 factors limiting species dispersal? What are 3 factors limiting species dispersal?

Answer 1 Physical barriers Physical barriers Climate Climate competition competition

Question 2 If the seed of a tropical plant floated to Hawaii, would the species disperse successfully? If the seed of a tropical plant floated to Hawaii, would the species disperse successfully?

Answer 2 Perhaps… Yes, it could disperse… because Seed overcame physical barriers Seed overcame physical barriers Climate suits a tropical plant Climate suits a tropical plantOR Didn’t work because existing plants can outcompete new species

Question 3 Which factors that limit dispersal also limit a population’s size? Which factors that limit dispersal also limit a population’s size?

Answer 3 Competition Competition Physical barriers Physical barriers NOT weather and climate NOT weather and climate

Continental Drift and Dispersal Look at figure 10 on page 55. Look at figure 10 on page 55. Where would organisms still be able to move freely from one continent to another? Where would organisms still be able to move freely from one continent to another?

Answer North America and Europe/Asia North America and Europe/Asia Africa and South America Africa and South America Antarctica and Australia Antarctica and Australia

Question 2 What happened to India? What happened to India?

Answer 2 It joined Europe/Asia. It joined Europe/Asia.

Question 3 What do you think happened to organisms on the continents that remained separated? What do you think happened to organisms on the continents that remained separated?

Answer 3 They evolved into unique species found nowhere else in the world. They evolved into unique species found nowhere else in the world.