Answer: C
Explanation:
any of several compounds that consist of a ribose or deoxyribose sugar joined to a purine or pyrimidine base and to a phosphate group and that are the basic structural units of nucleic acids (such as RNA and DNA)
metamorphosis
i hope this helps <3
Answer:
A common birth defect that is usually due to an extra chromosome 21( trisomy 21) .
