Answer:
About 5billion years ago is the correct option.
Explanation:
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Answer:
The real breakthrough in understanding DNA, however, came with the discovery of its structure in 1953. The discovery of the structure of DNA is often credited to James Watson and Francis Crick.
Explanation:
Answer:
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Wave velocity in common usage refers to speed, although, properly, velocity implies both speed and direction. The velocity of a wave is equal to the product of its wavelength and frequency (number of vibrations per second) and is independent of its intensity.
Explanation:
<span>C. Glycolysis
Krebs cycle and ETC only occur during aerobic respiration</span>
