Answer:
faced a struggle for survival
Explanation:
The woolly mammoths became extinct, unlike the other species, because the woolly mammoths faced a struggle for survival due to changing of environmental conditions. Global warming is the main cause of extinction of woolly mammoth which destroy their habitats about 10,500 years ago. The environmental conditions are not favourable for them so they faced struggle for survival which causes extinction of woolly mammoth.
Answer:
They occur in thousands of years or within billions of years.
They affect populations and species more slowly than short-term changes.
They can affect the DNA of living things over time.
Explanation
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Answer:
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Explanation:
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They reduce the amount of leakage through small seep holes that sometimes form in the geomembrane part of the liner, this helps prevent plants & animals being harmed by the waste created by contaminated water.