BookerBencosme
Answered

In the human body, oxygen is absorbed by the lungs and nutrients are absorbed by the
small intestine. In a single-celled organism, this absorption directly involves the

nucleus
chromosomes
cell membrane
chloroplasts



Answer :

meerkat18
The question is asking to choose among the following choices that could complete the said passage in your question, base on my research and further investigation, I would say that the answer would be Cell Membrane. I hope you are satisfied with my answer and feel free to ask for more 
saadhussain514

The correct option for above statement is:

c.cell membrane



The cytomembrane (plasma membrane) could be a skinny semi-permeable membrane that surrounds the protoplasm of a cell. Its operate is to shield the integrity of the inside of the cell by permitting sure substances into the cell, whereas keeping different substances out. It conjointly is a base of attachment for the complex body part in some organisms and therefore the cell membrane in others. So the cytomembrane conjointly serves facilitate support the cell and help maintain its form.