Answer:
The correct answer is A.
Explanation:
A mutagen changes the level of mutations that occur in the DNA either by affecting it physically or chemically. This helps researchers create different organisms with altered phenotypes according to what the research needs so that the genes can be investigated further under a controlled environment.
So the answer is A.
I hope this helps.
Um lets see so first coold air comes pushing awah heat to another area. i tihnk
Answer:
Mirrors are essential to every home. They help us in our daily mundane lives, though we rarely ever really appreciate their usefulness. From the moment we get up at night to the time we ready ourselves for sleep, we almost always seek for a mirror to take a look at ourselves. Mirrors reflect to us how we look, how clothes fit us, and how things fit.
Explanation:
The number of protons in a neutral atom equals the number of ELECTRONS.
Answer: the <span>Permian–Triassic extinction event ; {"end of the Permian era"} .
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