( C ) -That the spontaneous generation doesn’t happen
Answer: 101 neutrons
An element's atomic number is the number of protons in its nucleus. X has 52 protons. The mass number is simply the number of protons AND neutrons in the nucleus. Since 52 is given, it's correct to assume that the remainder consists of neutrons. 153-52 will give you the number of neutrons.
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Answer:
C. Enhancer
Explanation:
The enhancer is a regulatory DNA sequence that might be located thousands of nucleotide away from the transcription start site of a gene.