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Why do you suppose plants and forests appeared in large numbers before large animals did?

Why do you suppose plants and forests appeared in large numbers before large animals did?

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Why do you suppose plants and forests appeared in large numbers before large animals did? Several of the choices may be correct. Select the options you expect to be the strongest contributing factors.

Choose one or more:
A.Plants had to change less to survive on land.
B.Plants were driven to land by scarce resources in the oceans, such as light and minerals.
C.The increased oxygen levels produced by land plants accelerated animal evolution.
D.Animals need food, and there was none on land before plants.
E.It was too cold for animals at first.
F.There was not enough oxygen for lungs to be effective before plants colonized land.
G.The order was pure chance and could have gone either way.
H.Animals are more susceptible to radiation and needed more ozone in order to survive out of the water.

 
 
 
 
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