Answer:
A or B
Explanation:
To be honest both are accurate.
An insertion mutation occured.
After the mutation, a letter was inserted, and the others remained intact. The number of letters increased by 1.
Answer:
During prophase, which occurs after G2 interphase, the cell prepares to divide by tightly condensing its chromosomes and initiates mitotic spindle formation. The chromatin fibers condenses into discrete chromosomes. The nucleolus also disappears during early prophase.
D oxygen there was no free oxygen on the earth
Answer:
False; The levels of carbon dioxide have significantly increased since the industrial revolution.
