Homologous structures (Not to be confused with Homologous pairs)
Dear Jacqueline32, you can use genotype like this: The genotype of the man was Aa.
The correct answer is B. Oxygen.
Oxygen, as a part of the atmosphere, also participates in UV protection, besides being necessary for breathing.
Answer:
both types of cells have a cell membrane
Hope this helps!
https://www.nature.com/scitable/topicpage/genetic-mutation-1127
