They do not respond to stimuli they do not grow they do not do any of the things we normally associate with life. They have no energy metabolism they do not grow they produce no waste products they do not respond to stimuli and they do not reproduce independently.
A response to a stimulus is defined by an almost immediate reaction to some change in the environment.
Do viruses respond to stimuli. The most simple viruses have only two parts. Viruses are acellular particles that lack the properties of living things but have the ability to replicate inside living cells. Living beings such as plants and animals contain cellular machinery that.
But while it is understood that this. Not really although it depends on what your definition of alive is two infectious disease doctors told Live Science. Only when a virus starts reproducing in a cell can it weakly respond to stimuli.
In addition they respond to stimuli and evolve. Dont respond to external stimuli. The universal plant.
Viruses pass into the environment from clinically ill or carrier hosts. Viruses arent able to respond to stimuliwhen outside of a host cell because outside host cells viruses are dormant and sometimes even considered dead. While they dont change behaviors in response to touch or sound or light the way that humans bacteria or sea sponges might there has not been enough research done to definitively say that viruses do not respond to anything.
Viruses on the other hand do none of those things. Lets do a little comparison of two well-known disease-causing agents to illuminate the issue. Viruses can do some of these things.
See full answer below. Thanks a lot Pegah it will help me with homework your welcome im glad. They do not grow produce waste products or respond to stimuli.
What molecule does a virus insert into a host cell that enables the virus to redirect the host cells enzymes and ribosomes. They do not reproduce independently but depend on another living. They do not metabolize to produce energy.
The only sign of life that they show is their ability to. Viral nucleic acids. Some researchers also suggest that living things must be able to respond to stimuli and evolve over time.
In isolation viruses and bacteriophages show none of the expected signs of life. Population concentrations and movement both animal and human have been steadily increasing in this cent. Bacteria are one-celled organisms that grow replicate themselves respond to stimuli maintain internal homeostasis and metabolize food for energy.
Viruses adapt to their hosts by evading defense mechanisms and taking over cellular metabolism for their own benefit. Viruses are not living. – can perform biological processes autonomously – can actively respond to environmental stimuli.
Alterations in cell metabolism as well as side-effects of antiviral responses contribute to symptoms development and virulence. Viruses do not show many of the expected signs of life such as response to stimuli. Although they do not replicate outside living animals or people they are maintained and transported to susceptible hosts.
1 a genome DNA or RNA that is a blueprint with instructions for making more viruses and 2 a capsid protein shell that protects the genome. The viruses that invade plants do so by entering an open wound or other breaks in the surface or from the actions of an animal invader. In order to reproduce they must infect a living host and hijack its resources.
Contain genetic material capable of undergoing evolution by. Features shared by cells and viruses. September 2 2010 at 221 pm At first glance it may seem as though viruses are alive because they contain the universal genetic code something that all living things have in common.
The first virus to be isolated and described was the tobacco mosaic virus which earned its investigator a Nobel prize in 1946. In the view of biologists they are not alive. Viruses cant generate their own energy and though they can reproduce and even evolve with.
Strictly speaking they should not be considered as living organisms at all. Become a member and unlock all. Viruses also often have proteins called receptors that stick out of the shell and help the virus sneak inside cells.
Sometimes a virus may spill over from its usual host species into a novel one where usually will fail to successfully infect and further transmit to. Viruses occupy a strange no-mans-land between the living and the nonliving. Acellular can mutate contain proteins carbohydrates and nucleic acid non-motile reproduce in cells do not respond to stimuli no metabolism grow in numbers Enveloped virus Generally enveloped viruses acquire their envelopes from plasma membrane when they exit from the cell.