Biology, 08.07.2019 22:10, crysderria
Are viruses alive? this a question debated among scientists throughout the world. scientists discovered the tiny, disease-causing agents that were believed responsible for such diseases as rabies and hoof-and-mouth disease. initially, scientists classified viruses as “living”, but in 1935, they began to change their thinking. scientists crystalized the tobacco mosaic virus, noting that it did not have cell structure, of even the simplest kind. there was no membrane, no nucleus, and no ribosomes. they determined that a virus was nothing more than a strand of nucleic acid, dna or rna, protected by a protein shell. scientists also believed that viruses lacked the mechanisms necessary for metabolic function. some scientists argued that viruses are capable of response to stimuli. when not in a favorable environment within a host cell, the virus remains an unchanging, dormant, organic particle. but once in contact with the susceptible host or in a favorable environment, the virus becomes active, injecting its nucleic acid into the host cell, and eventually self-replicating. in this manner, one virus is capable of producing many other viruses, identical to the original, to attack host cells. you are debating whether or not viruses are alive. you are arguing for the negative, that is, viruses are not alive. first, list the characteristics of life. then, use evidence from the passage to support your side of the debate.
Answers: 2
Biology, 21.06.2019 15:00, Dashavu7165
The central dogma of molecular biology is centered upon the process of protein synthesis, in which the information from dna is transcribed and translated, resulting in multiple amino acids being joined to form a)lipidsb)proteinsc)carbohydratesd) nucleic acids
Answers: 3
Biology, 22.06.2019 05:20, ingle75
Which of the following two events occur to create a sea breeze? select all that apply. warm air rises on the ocean and moves toward the land to cool warm air rises on land and moves toward the ocean to cool cool air moves from the ocean to be warmed by the land cool air moves from the land to be warmed by the ocean
Answers: 2
Biology, 22.06.2019 12:40, sheilashair
Which statement describes how favorable traits in a population relate to natural selection? they are the only traits that ever exist in the population. they build in the population over time. they are rarely passed on to offspring. they are found only in a few individuals within the population.
Answers: 1
Are viruses alive? this a question debated among scientists throughout the world. scientists discov...
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