NEET BIOLOGY

BIOLOGICAL CLASSIFICATION

VIRUSES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What reason do scientists give for saying that viruses are not living organisms?
A
they cannot reproduce without the aid of a host
B
they do not metabolize food into energy
C
they do not have organized cells
D
all of the above
E
none of the above
Explanation: 

Detailed explanation-1: -Viruses are not made out of cells, they can’t keep themselves in a stable state, they don’t grow, and they can’t make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.

Detailed explanation-2: -Viruses also lack the properties of living things: They have no energy metabolism, they do not grow, they produce no waste products, and they do not respond to stimuli. They also don’t reproduce independently but must replicate by invading living cells.

Detailed explanation-3: -A) Viruses are not alive because they lack some of the key characteristics of living organisms, such as a cytoplasm of organelles. They cannot carry out cellular functions such as metabolism and homeostasis.

There is 1 question to complete.