Answer:
Option (2).
Explanation:
Hemoglobin may be defined as red color pigment present in the red blood cells. The main function of hemoglobin is the transport of oxygen molecules in the body.
Various factors can affect the binding of oxygen with hemoglobin. The higher the partial pressure of oxygen, more oxygen will bind to the hemoglobin and transport faster in the blood. Low partial pressure decreases the binding affinity of oxygen with hemoglobin. All other factors mentioned in the questions are correct.
Thus, the correct answer is option (b).
The first difference is the size, cells are sized in micrometer (visible at optic microscope) and viruses in nanometer (electronic microscope).
Cells have both DNA and RNA, virus have only one genetic material (DNA or RNA).
Cells have always a membrane, not all the viruses have a membrane, but all of them have capsids in different forms.
Viruses cannot live on their own, they have to parasite a cell to proliferate. Cells can live by themselves and proliferate by scissiparity (divisions).
Cells have ribosomes to translate their RNA. viruses don't (they use the infected cells' ribosomes).
Answer: “ Systematics is concerned both with Taxonomy, the naming and classification of life, and Phylogeny, the science and study of understanding the family tree of all life on Earth. ... Systematics, then is the classification of life according to its phylogenetic (evolutionary) relationships.” -http://palaeos.com/systematics/
