Answer:
The cosmic microwave background radiation.
This is completely consistent with a fireball event in which the radiation field was in thermal equilibrium, and is perhaps the most convincing evidence for the Big Bang.
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Answer:
PCR is used in many research labs, and it also has practical applications in forensics, genetic testing, and diagnostics. For instance, PCR is used to amplify genes associated with genetic disorders from the DNA of patients (or from fetal DNA, in the case of prenatal testing).
Answer:
1
Explanation:
1 is a cell wall and only plants have these!