I will give brainliest Protein synthesis can occur on the rough endoplasmic reticulum (ER) but not on the smooth ER.

Which cell structures are attached to the surface of the rough ER that allow it to make proteins?

Choose 1

(Choice A)
A
DNA strands

(Choice B)
B
Ribosomes

(Choice C)
C
Vacuoles

(Choice D)
D
Chloroplasts

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.