Please answer this: The ozone layer helps organisms by protecting them from Sun's ultraviolet radiation. To find the usefulness of ozone layer Mike wanted to see how much ozone are there in the atmosphere. He then collected three samples of atmosphere, sample A sample B, and sample C. Sample A was collected from the upper portion of the stratosphere. Sample B was collected from the lower portion of the stratosphere. Sample C was collected from the lower atmosphere. Which sample would have lower concentration of ozone, sample A or sample B?
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Answer: sample A

Please answer this: Two women have just undergone different types of mutations without them being aware of it. Kim has just had a mutation in the DNA of her sex cells. Holly has had a mutation in her body cells. Both mutations would be able to be discovered if they happen to go to a doctor, and the doctor knows to look for it, but that is unlikely since the women are unaware these changes happened. Who had a somatic mutation?
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Answer: Holly

Please answer this: Barb and Ann were friends. The used to play together outside in the yard till one day Barb's parents found out that she had sickle cell anemia. They haven't played together since. Which girl had hemoglobin S in her blood?
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Answer:
Barb