Answer:
1/ Climate change
2/ Asteroid impacts
3/ Massive volcanic eruptions
4/ Sun explodes
etc. (all the things above are most likely to happen but alien invasion or things like that is also a theory that you can add depends mostly if you like it or not)
Answer:
Why are stem cell research important? Stem cells represent an exciting area in medicine because of their potential to regenerate and repair damaged tissue. Some current therapies, such as bone marrow transplantation, already make use of stem cells and their potential for regeneration of damaged tissues.
Explanation:
Answer:
Maintenance of homeostasis usually involves negative feedback loops.
Explanation:
These loops act to oppose the stimulus, or cue, that triggers them. For example, if your body temperature is too high, a negative feedback loop will act to bring it back down towards the set point, or target value, of 98.6
Alfred Wegener, in the first three decades of this century, and DuToit in the 1920s and 1930s gathered evidence that the continents had moved. They based their idea of continental drift on several lines of evidence:
- fit of the continents
- paleoclimate indicators
- truncated geologic features
- and fossils.
<h3>What is Alfred Wegener's theory of continental drift?</h3>
The existence of Pangea was first suggested at the beginning of the 20th century by the German meteorologist Alfred Wegener, which created a huge controversy among the scientific class of the time.
<h3>Paleoclimate indicators</h3>
Pangea is the name given to the supercontinent that made up the Earth's surface from the Permian to the Triassic periods. This single mass was also bathed by a single ocean, called Panthalassa. The separation of Pangea, which gave rise to the configuration of the continents as we know them today, began 230 million years ago.
With this information, we can conclude that Wegener also noticed that there were major mountain building event sin the northern Appalachians and in northwestern Europe of the same age.
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