Are viruses smart
Viruses are as simple as they are “smart”: too elementary to be able to reproduce by themselves, they exploit the reproductive “machinery” of cells, by inserting pieces of their own DNA so that it is transcribed by the host cell..
Where did Spanish flu start
While it’s unlikely that the “Spanish Flu” originated in Spain, scientists are still unsure of its source. France, China and Britain have all been suggested as the potential birthplace of the virus, as has the United States, where the first known case was reported at a military base in Kansas on March 11, 1918.
What disease no longer exists
Two infectious diseases have successfully been eradicated: smallpox and rinderpest. There are also four ongoing programs, targeting poliomyelitis, yaws, dracunculiasis, and malaria.
Where did the first virus come from
Viruses may have arisen from mobile genetic elements that gained the ability to move between cells. They may be descendants of previously free-living organisms that adapted a parasitic replication strategy. Perhaps viruses existed before, and led to the evolution of, cellular life.
Are viruses intelligent
“Viruses are very intelligent. They can think. They do things that we do not expect. They adapt to the environment.
Are viruses a life form
Viruses are considered by some biologists to be a life form, because they carry genetic material, reproduce, and evolve through natural selection, although they lack the key characteristics such as cell structure that are generally considered necessary criteria for life.
When did humans first appear on Earth
seven million years agoThe first human ancestors appeared between five million and seven million years ago, probably when some apelike creatures in Africa began to walk habitually on two legs. They were flaking crude stone tools by 2.5 million years ago. Then some of them spread from Africa into Asia and Europe after two million years ago.
Are some viruses man made
The first man-made infectious viruses generated without any natural template were of the polio virus and the φX174 bacteriophage. With synthetic live viruses, it is not whole viruses that are synthesized but rather their genome at first, both in the case of DNA and RNA viruses.
Who is the father of viruses
Martinus BeijerinckMartinus Beijerinck is often called the Father of Virology.
How many viruses can be in a single drop of blood
From a single drop of blood, researchers can now simultaneously test for more than 1,000 different strains of viruses that may have currently or previously infected a person.
What is the oldest virus ever
Smallpox and measles viruses are among the oldest that infect humans. Having evolved from viruses that infected other animals, they first appeared in humans in Europe and North Africa thousands of years ago.
Are viruses older than life
Viruses did not evolve first, they found. Instead, viruses and bacteria both descended from an ancient cellular life form. But while – like humans – bacteria evolved to become more complex, viruses became simpler. Today, viruses are so small and simple, they can’t even replicate on their own.
How do viruses make you sick
Viruses make us sick by killing cells or disrupting cell function. Our bodies often respond with fever (heat inactivates many viruses), the secretion of a chemical called interferon (which blocks viruses from reproducing), or by marshaling the immune system’s antibodies and other cells to target the invader.
Do viruses have DNA
Most viruses have either RNA or DNA as their genetic material. The nucleic acid may be single- or double-stranded. The entire infectious virus particle, called a virion, consists of the nucleic acid and an outer shell of protein. The simplest viruses contain only enough RNA or DNA to encode four proteins.
What are some older viruses
What are some of the older viruses? They are polio, influenza, cholera, tuberculosis, and the common cold.
Are viruses living
Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things.
Where did Ebola come from
Ebola virus was first discovered in 1976 near the Ebola River in what is now the Democratic Republic of Congo. Since then, the virus has been infecting people from time to time, leading to outbreaks in several African countries. Scientists do not know where Ebola virus comes from.
Why do viruses kill the host
The virus cannot replicate without a host cell, which it hijacks for its survival. During an infection, it utilises its host cell’s metabolism to make lots of copies of the virus, which are subsequently released, and infect new host cells while the host cell dies.