12. what evidence suggests that proteins are synthesized and modified in the rough er as opposed to the
smooth er?
a. ribosomes are associated with the surface of the rough er.
b. ribosomes are associated with the surface of the smooth er.
c. proteins can be found in the membrane of the rough er but not the smooth er.
d. the smooth er functions in the synthesis of phospholipids.

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.