instruction:
In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
question:
Question: Acids are molecular compounds that dissolve in water to produce hydronium ions and what else? Answer: an anion
answer:
Acids are molecular compounds that dissolve in water to produce hydronium ions and an anion else.


question:
Question: While spermatogenesis produces four haploid sperm cells, oogenesis produces one mature what? Answer: ovum
answer:
While spermatogenesis produces four haploid sperm cells, oogenesis produces one mature ovum.


question:
Question: What sac, which was sitting on top of the flat embryo, envelops the embryo as it folds? Answer: amniotic sac
answer:

The amniotic sac, which was sitting on top of the flat embryo, envelops the embryo as it folds.