SCIENCE
BIOLOGICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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400
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200
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100
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300
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Detailed explanation-1: -This time period took place 359 to 299 million years ago. The Carboniferous period, part of the late Paleozoic era, takes its name from large underground coal deposits that date to it.
Detailed explanation-2: -The land was dominated by the ancestors of all mammals, the Synapsids, and the ancestor of all reptiles and birds, the Diapsids. Living Diapsids include crocodiles, lizards, snakes, and tuatara.
Detailed explanation-3: -As plants became firmly established on land, life once again had a major effect on Earth’s atmosphere during the Carboniferous Period. Oxygen made up 20 percent of the atmosphere-about today’s level-around 350 million years ago, and it rose to as much as 35 percent over the next 50 million years.