Question

A researcher isolates the blood of an individual who is sick. The blood is filtered through a porous material that will prevent all cells from passing through. The filtered serum of the blood is then injected into a healthy patient. This patient shows signs of the illness within days of the inoculation. What is the most likely causal agent of the disease based on this information?
A) a virus
B) a fungal pathogen
C) a bacterial pathogen
D) a protozoan parasite

Answer 1

The answer would be A. a virus

The question states that the blood was filtered thru a porous material that prevented all cells from passing thru.

All of the options are cells except viruses.

Hope this helps:)

Answer 2

Answer:

The correct answer is option a, that is, a virus.

Explanation:

It is clearly mentioned in the question, that the blood is filtered via a porous substance, which restricts all the cells to pass through it, thus, of the mentioned options the only virus is a component, which is not a cell, while all the other mentioned things are formed of cells.  

Viruses are not formed of cells, they do not possess the tendency to maintain themselves in a steady condition, and they cannot grow and even cannot produce their own energy. Though they can adapt and replicate on the basis of their surroundings. Hence, the viruses are more like androids in comparison to the real living species.  

A viral disease takes place when the body of an organism gets invaded by the pathogenic viruses, and the infectious particles of viruses get combined with and enter the vulnerable cells. The host shows the symptoms of the illness after some days of invasion when the virus starts to proliferate.