(sn8 t environmental factors is the distribution of southern beech trees associated? ch trees are found in Antarctica. What can you surmise about the climate of Antarctica beech trees lived there? the distribution of beech trees at that time? Lere no living beech trees in Antarctica? crees evolve on Laurasia or on Gondwana? e present-day discontinuous distribution of these ancient trees. How did populations st on different continents?

Human Anatomy & Physiology (11th Edition)
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Chapter1: The Human Body: An Orientation
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5 SOUTHERN BEECH TREES (Nothofagus)
a With what environmental factors is the distribution of southern beech trees associated?
b Fossil beech trees are found in Antarctica. What can you surmise about the climate of Antarctica
at the time beech trees lived there?
c What was the distribution of beech trees at that time?
d Why are there no living beech trees in Antarctica?
e Did beech trees evolve on Laurasia or on Gondwana?
f Explain the present-day discontinuous distribution of these ancient trees. How did populations
come to exist on different continents?
6 BLACKPOLL WARBLER (Dendroica striata). Hint: Use North American biomes.
a What are the two distinct habitats in which this bird occurs?
b How do you explain its occurrence in such different habitats? (Hint: What do many birds do when
winter comes?)
C Can you determine whether these birds evolved on Laurasia or on Gondwana?
d Why or why not?
7 NORTH AMERICAN BIOMES. Examine the map of North American biomes.
a Why isn't this map an accurate description of the modern distribution of these biomes?
b Why doesn't the desert extend all the way to the Pacific coast in Southern California?
c Why has the Miami, Florida, area been a successful area for the introduction of exotic tropical
species, such as parrots from South America?
d Why were these tropical species originally absent from Florida?
Transcribed Image Text:5 SOUTHERN BEECH TREES (Nothofagus) a With what environmental factors is the distribution of southern beech trees associated? b Fossil beech trees are found in Antarctica. What can you surmise about the climate of Antarctica at the time beech trees lived there? c What was the distribution of beech trees at that time? d Why are there no living beech trees in Antarctica? e Did beech trees evolve on Laurasia or on Gondwana? f Explain the present-day discontinuous distribution of these ancient trees. How did populations come to exist on different continents? 6 BLACKPOLL WARBLER (Dendroica striata). Hint: Use North American biomes. a What are the two distinct habitats in which this bird occurs? b How do you explain its occurrence in such different habitats? (Hint: What do many birds do when winter comes?) C Can you determine whether these birds evolved on Laurasia or on Gondwana? d Why or why not? 7 NORTH AMERICAN BIOMES. Examine the map of North American biomes. a Why isn't this map an accurate description of the modern distribution of these biomes? b Why doesn't the desert extend all the way to the Pacific coast in Southern California? c Why has the Miami, Florida, area been a successful area for the introduction of exotic tropical species, such as parrots from South America? d Why were these tropical species originally absent from Florida?
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