Question

which discovery is attributed to phoebus levene? extraction and observation of dna identification of ribose and deoxyribose recognition of rna as dnas messenger construction of an accurate dna model

Explanation:

Phoebus Levene is known for identifying ribose and deoxyribose. Miescher extracted and observed DNA. Crick and Watson constructed an accurate DNA model. RNA as DNA's messenger was discovered later.

Answer:

identification of ribose and deoxyribose