Are viruses alive? This question is debated among scientists throughout the world. Consider the following passage. Scientific re
searchers discovered agents that behaved like bacteria causing diseases such as rabies and hoof-and-mouth, but were much smaller. At this time it became the general view that viruses were biologically "alive." This perception changed in 1935 when the tobacco mosaic virus was crystallized and scientists demonstrated that the particles lacked any mechanisms necessary for metabolic function. It was determined that viruses consisted of a nucleic acid, DNA or RNA, surrounded by a protein shell and the scientific view changed: viruses are complex biochemical mechanisms but not alive. According to the passage, the MOST IMPORTANT evidence supporting the opinion that viruses are not alive is that they
A) cause disease.
B) contain DNA or RNA.
C) are much smaller than bacteria.
D) do not have a cellular structure.
They are comparable in light of the fact that they are both compound sources of vitality utilized by cells. They are altogether different as far as arrangement and structure.
Genetically modified food is food produced from plants or animals whose DNA has been altered through genetic engineering. These genetically modified organisms are often called GMOs for short.
