Answer:
The <u>nuclear envelope</u> is composed of two concentric lipid bilayer membranes separated by an intermembrane space of about 20-40 nm. The outer membrane is continuous in many places with the rough endoplasmic reticulum. Like the rough ER the outer membrane of the nuclear envelope is dotted with ribosomes.
In DNA replication, the new strand of dna that is synthesized in one continuous piece is called the leading strand
The correct answer of the given question above would be option C. One of the human activities that would contribute in the increasing carbon dioxide levels and toxins in the atmosphere would be the burning of oil and coal. Burning of oil and coal would produce more carbon dioxide, which contributes to the formation of the greenhouse effect.
