What are two important differences in the structures of dna and rna? the sugar of rna is ribose, rather than dna's deoxyribose. the base uracil substitutes for dna's thymine. the sugar of rna is deoxyribose, rather than dna's ribose. the base thymine substitutes for dna's uracil. rna always has a single strand, while dna always has a double strand. dna always has a single strand, while rna always has a double strand.

The construction of phylogenetic trees is a mapping out the proposed divisions and common ancestors of all living species. traditionally, these trees have been built using morphological data, such as appearance and embryology. recently, it has been possible to construct these trees using molecular data. phylogenetic trees based on different types of information agree with each: that there is strong evidence of a real underlying common descent. this phylogenic tree is composed based on molecular data (rrna). what statements can we infer are true about the organisms throughout the tree? because the tree is rooted, all branches share a common ancestor. all organisms have some sort of cellular structure/organization. all eukaryotes evolved from bacteria. since the organisms contain rna, they share the same dna. if the organisms contain rna, the share the same four nitrogen bases.

Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. which most likely affects the development of these traits? testes ovaries prostate gland vulva

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks