Phylogeny is the way of studying evolution by trees (branching) of all evolutionary organisms. It represents, how organisms are connected with each other at specific time period. By studying organism structure/function with specific time, it is easy and more systematic to investigate evolutionary concepts
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The correct answer is - climate change.
The gigantic meteorite that stuck the Earth caused a lot of damage directly, and the impact itself killed a lot of dinosaurs, but what led to the extinctions of them was the drastic change in the climate and in general of the lower atmosphere.
Because of the impact, as well as all the volcanic activity that was triggered of it, enormous amounts of dust and ashes were released into the atmosphere. The whole planet was covered by this dust and ashes, which led to prolonged period of very cold weather, toxic atmosphere (except for the part of it just over half a meter of the ground), and acid rains. Because of the short period in which all this happened, the dinosaurs where not able to adapt and they died off.
Ice cores drawn from Greenland, Antarctica, and tropical mountain glaciers show that Earth’s climate responds to changes in greenhouse gas levels. Ancient evidence can also be found in tree rings, ocean sediments, coral reefs, and layers of sedimentary rocks.
The answer is B.
A. can't be right because the Aborigines were not Indians, because the Indians were the first people in North America.
C. isn't right either only because the Archaic Indians lived in South America .
D. can't be right because Mesoamericans also lived in South America.
Answer:
Modern Agriculture typically involves the use of machinery that uses fossil fuel, which emit carbon dioxide, a greenhouse gas, when burned. Also, herds of livestock release methane into the atmosphere, another greenhouse gas.
