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77julia77 [94]
3 years ago
11

Which is the best example of physical weathering?

Biology
1 answer:
Law Incorporation [45]3 years ago
5 0
A because the water is frozen and then it thawed out which causes rock to start breaking
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Water and polymers.

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What happens if your DNA has a mutation? What types of things can cause mutations?
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A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time. Mutations can also occur as the result of exposure to environmental factors such as smoking, sunlight and radiation. Often cells can recognize any potentially mutation-causing damage and repair it before it becomes a fixed mutation.

Mutations contribute to genetic variation within species. Mutations can also be inherited, particularly if they have a positive effect. For example, the disorder sickle cell anaemia is caused by a mutation in the gene that instructs the building of a protein called hemoglobin. This causes the red blood cells to become an abnormal, rigid, sickle shape. However, in African populations, having this mutation also protects against malaria.

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