What are embryos and how can they be helpful for studying the relationships between animals of different species?​

Which prevent errors in dna replication? a. helicase enzyme checks the dna for errors. b. each base can attach to only one other type of base. c. ribosome enzymes prevent errors from happening. d. dna contains no complementary base pairs.

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?