The neuron, or nerve cell, is the basic functional unit of the nervous system
Explanation:
1). Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing.
2) is pic
Answer:
the endoplasmic reticulum
Explanation:
it is the endoplasmic reticulum and the ribosomes of the specialized cells in the pancreas that make insulin