Answer: Stratosphere
Explanation:Stratosphere – the region of the Earth's atmosphere between the troposphere and.
Thermosphere – The region of the atmosphere above the mesosphere in which.
Troposphere – The lowest and most dense layer of the atmosphere, extending 8 to 16.
B is the answer to your question.
Answer:
The addition of an extra chromosome usually occurs spontaneously during conception. The cause of this is unknown and prevention is not possible. The most important risk factor for trisomy conditions is maternal age. Women in their late 30s and 40s have a higher chance of trisomy conditions occurring.
Answer:
RNA is formed by a single strand of nucleotides and not a double helix like DNA; RNA, as a protein, but not as DNA, can catalyze important biological reactions. The RNA molecules that function as enzyme proteins are called ribozymes.
Explanation:
