The statement about the nuclear envelope which is false is D - The nuclear envelope is continuos with the Golgi apparatus.
Explanation:
The nuclear envelope is composed of two membranes pierced by pores. They are distributed throughout the entire surface of the envelope and are much more than perforations in which both external and internal membranes are continued. Inside the pores a set of proteins form a structure called NPC where the smallest molecules pass, since the larger ones require energy input. The nuclear envelope that is reinforced by filaments, its two bilayers are continued with the endoplasmic reticulum membrane system.
Answer: When silver is exposed to sulfur-containing gases in the air, it discolours and then darkens as it reacts with the gas to form a surface layer of tarnish. This process is called tarnishing.
