Mutations occur when DNA makes a mistake in cell division. This could change the appearance and other disorders of a person. An example would be sickle cell anemia.
The answer to this is C- electromagnetic waves.
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<span>According to scientific evidence, earth’s earliest atmosphere lacked oxygen. Over time, oxygen was added to the atmosphere. Which statements explain how this change occurred and how it affected life on earth? Choose all answers that are correct. A. The addition of oxygen to the earth's atmosphere helped</span>
The answer to the question is letter B
Answer:
Prophase
Explanation:
During the prophase, chromatin condense to form chromosomes that are visible.
