What is a vestigial stucture A. A type of soul without a membrane-bound nuclear us and without a membrane bound organelles
B. Structures that occur in different species better similar enough to suggest that that the Species had a common ancestor
C. A type of sale that has a membrane-bound nuclear us in a membrane-bound organelles
D. Structures that appear to have no function for the organism but probably had a function in an ancestral organism

Explanation:

Vestigiality is the retention during the process of evolution of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species. Assessment of the vestigiality must generally rely on comparison with homologous features in related species.

hi there!

answer: b. nucleolus

explanation: nucleolus is a structure in the nucleus are ribosomes are made.

hope this you!

have a nice day! : )

: d

-charlie

you! : )

: d

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.