객관식
Fern gametophytes are __________.
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28. Plants
Seedless Vascular Plants
객관식
The first large forests formed in the Carboniferous period. The decrease in CO2 levels by all of these plants caused __________.
A
global warming
B
a lack of CO2 for photosynthesis
C
the formation of fewer stomata in plant leaves
D
seed plants to become the dominant types of plants on Earth
E
global cooling
검증된 단계별 안내1
Understand the context: The Carboniferous period is known for the extensive formation of forests, which significantly impacted the Earth's atmosphere.
Recognize the role of plants in the Carboniferous period: Plants absorb carbon dioxide (CO2) during photosynthesis, which can lead to a decrease in atmospheric CO2 levels.
Consider the effects of decreased CO2 levels: Lower CO2 levels can influence global temperatures, as CO2 is a greenhouse gas that traps heat in the atmosphere.
Identify the relationship between CO2 levels and climate: A decrease in greenhouse gases like CO2 can lead to global cooling, as less heat is retained in the atmosphere.
Conclude the impact: The extensive growth of forests during the Carboniferous period led to a significant reduction in CO2 levels, contributing to global cooling.
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