Chemical weathering is believed to have increased in the Devonian due to the ___
ID: 290705 • Letter: C
Question
Chemical weathering is believed to have increased in the Devonian due to the ______ that allowed them to inhabit upland areas rather than swamps and fringes of rivers and lakes.
evolutionary changes in the atmosphere
evolutionary changes in animals
evolutionary changes in plants
evolutionary changes in calcareous nannoplankton
The sharp ______ in CO2 during the Cretaceous into the Cenozoic was due primarily to the ______.
decline; evolutionary changes in the atmosphere
increase; evolutionary origin of dinosaurs
increase; evolutionary origin of angiosperm plants
decline; evolutionary origin of calcareous nannoplankton
CO2 levels during the Carboniferous and early part of the Permian were _____ modern CO2 levels due to ______.
greater than; burial of organic matter in swamps and extensive glaciation in the Southern Hemisphere
similar to; burial of organic matter in swamps and extensive glaciation in the Southern Hemisphere
greater than; weathering of organic matter in swamps and extensive glaciation in the Southern Hemisphere
similar to; burial of organic matter in swamps and extensive glaciation in the Northern Hemisphere
evolutionary changes in the atmosphere
evolutionary changes in animals
evolutionary changes in plants
evolutionary changes in calcareous nannoplankton
Explanation / Answer
Chemical weathering is believed to have increased in the Devonian due to the evolutionary changes in plants that allowed them to inhabit upland areas rather than swamps and fringes of rivers and lakes. This is because chemical weathering led to formation of soil which supported plant growth.
The sharp increase in CO2 during the Cretaceous into Cenozoic was primarily due to the evolutionary origin of angiosperm plants.
CO2 levels during the carboniferous and early part of the permian were similar to modern CO2 levels due to burial of organic matter in swamps and extensive glaciation in the southern hemisphere.
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