In mRNA, you use uracil (U) instead of thymine (T). The process is called transcription.
Hope this helped! :D
Animal cells do not have a cell wall or chloroplasts but plant cells do. This is just one example there are several ways. <span />
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Answer:
I believe it is B.
I am not sure if I am right, sorry if I am wrong.
Explanation:
During Stage A the muscles and tendons are working in unison to pull the leg backward and upward. In Stage B the tendons are being stretched and the muscles in the leg are driving forward, releasing their pent up energy (the muscles will burn oxygen until they run out at which point they will start producing lactic acid to keep providing energy for the leg, which is why your muscles burn when they are tired)