The various atmospheric conditions that occur at any given time in any place

There are so many examples for that in different areas, like biology experiment carried out in our lab recently.

Here's one link : https://www.creative-biogene.com/Services/Gene-Service/Gene-Synthesis-and-cloning-service.html

answer; ///(b) it is composed of four protein chains and four heme groups;

yes? sounds right, but you didn’t ask a question.