Why do we think that the forest communities of eastern North America have changed dramatically over the past 18,000 years, as evidenced in the image below? a cor- ettlers Freach gan- 5 and lands- 1. West SWE many today. e and excep s extent CORDILLERAN ICE SHEET Mark only one oval. FECAMAS Lake Tance LAURENTIDE ICE SHEET North of that line the climate was more thun 12C colder compared to pre-industrial tem peratures, fate ng early sectlers to move souch D) Pollen evolved at this time. bigger as glaciers As the gl rock and large enf and cenon When the behind a known as the mide today ag A) Glacial retreat exposed land for primary succession that long ago. B) Large fires exposed land for secondary succession that long ago. C) Successional changes are typically very rapid and all communities change at this speed.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Why do we think that the forest communities of eastern North America have
changed dramatically over the past 18,000 years, as evidenced in the image below?
a cor-
ettlers
reach
gigan-
S and
lands-
I west
IS WE
many
today.
e and
excep
s extent
CORDILLERAN ICE SHEET
Mark only one oval.
77
Lake Tabee
LAURENTIDE ICE SHEET
<}}
广州
North of that line the
cimate was more thun
12°C colder compared
to pre-industrial tem
peratures fore ng early
settlers to move souch
bigger as gacers
As the gl
rock and
large f
and cenon
When the
behind a
known as
the mide
OA) Glacial retreat exposed land for primary succession that long ago.
B) Large fires exposed land for secondary succession that long ago.
C) Successional changes are typically very rapid and all communities change at this
speed.
OD) Pollen evolved at this time.
Transcribed Image Text:Why do we think that the forest communities of eastern North America have changed dramatically over the past 18,000 years, as evidenced in the image below? a cor- ettlers reach gigan- S and lands- I west IS WE many today. e and excep s extent CORDILLERAN ICE SHEET Mark only one oval. 77 Lake Tabee LAURENTIDE ICE SHEET <}} 广州 North of that line the cimate was more thun 12°C colder compared to pre-industrial tem peratures fore ng early settlers to move souch bigger as gacers As the gl rock and large f and cenon When the behind a known as the mide OA) Glacial retreat exposed land for primary succession that long ago. B) Large fires exposed land for secondary succession that long ago. C) Successional changes are typically very rapid and all communities change at this speed. OD) Pollen evolved at this time.
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