Question

the _, which is a prominent structure within the nucleus, is the region where ribosome parts are made.

nuclear pores

nuclear membrane

endoplasmic reticulum

nucleolus

Explanation:

The nucleolus is a distinct structure within the nucleus where ribosome components are synthesized. Nuclear pores are for transport, the nuclear membrane encloses the nucleus, and the endoplasmic reticulum is involved in protein and lipid synthesis but not ribosome - part production in the nucleus.

Answer:

D. nucleolus