1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Goryan [66]
3 years ago
12

In 1899, Beijerinck found that the infectious agent of tobacco mosaic disease went through a filter of 0.1μm pore size. Stanley

later purified and crystallized the infectious agent from infected tobacco leaves. The infectious agent was found to be a(n)
Health
1 answer:
timofeeve [1]3 years ago
7 0

Answer:

Virus

Explanation:

The study for the pathogen of the tobacco mosaic disease started in 1886 by Adolf Mayer who thought that the pathogen is a small bacteria. Later studies on the Tobacco mosaic disease by other scientists also lead to the same observation.

Beijerinck confirmed that the tobacco mosaic causing disease is not caused by a bacteria but a soluble molecule which proliferates or replicates only when it remains present in the protoplasm of the host cell.

This infectious agent can pass through the filter of 0.1μm pore size that is smaller in size than a bacteria and the can be crystallised. This infectious was called the virus.

Thus, the Virus is the correct answer.

You might be interested in
Which of these STIs has a vaccine to prevent it?
ddd [48]
Which of these STIs has a vaccine to prevent it?

C. HPV
4 0
3 years ago
Read 2 more answers
Cocaine abuse can have neurological effects such as
natka813 [3]
Cocaine abuse can have neurological effects such as abusively fighting someone and much more factors that are bad that can really hurt someone deeply.

5 0
2 years ago
A 6-year-old boy with intellectual disability secondary to fragile X syndrome has been admitted to the hospital with a mitral va
salantis [7]

Answer:

The health professional who takes care of the case of the boy with fragile X syndrome should know that it is common for patients with this syndrome to have mitral valve prolapse.

Explanation:

Fragile X syndrome (FXS or SXF) is a genetic and hereditary condition, responsible for a large number of cases of mental deficiency and behavioral disorders, affecting one in 2,000 boys and one in 4,000 women. The syndrome is caused by mutations in the FRM1 gene present in a flaw called the fragile site located at the end of the long arm of the X chromosome.

For many carriers of the mutation, fragile X syndrome is asymptomatic. However, it is common for individuals with this syndrome to present behavioral disorders and intellectual impairment that can be present in different degrees, from mild learning or speech difficulties.

Some physical characteristics may suggest the presence of the syndrome from birth. This is the case of macrocephaly and low muscle tone. There are other subtle signs of the syndrome that become more evident with growth. They are: elongated face, large flapping ears, prominent jaw, very high and arched roof of the mouth, strabismus and myopia, joint hyperextension, hollow chest, mitral valve prolapse, recurrent otitis and, in 20% of cases, convulsions.

3 0
3 years ago
What is another name for alcohol?
yuradex [85]

Answer:

booze

Explanation:

hope this helps

(•‿•)

7 0
2 years ago
Read 2 more answers
In general, which is NOT critical to understanding how to communicate effectively?
VLD [36.1K]
<span>Based on my understanding, communicating 4 or 5 times per day is not absolutely critical to proper communication. So long as the individual learning is understanding how to be more proactive, the number of times communicated is not a critical function.</span>
7 0
3 years ago
Other questions:
  • Hallucinogens are used to treat pain and induce anesthesia. True False
    14·2 answers
  • What is the difference between a stimulant and depressant?
    15·2 answers
  • What is the purpose of the liver and why is a fatty liver bad for your health
    11·2 answers
  • What are the benefits of cardio exercise
    13·2 answers
  • Which accident could be classified as intentional and unpreventable ?
    7·2 answers
  • What are the 2 main risk factors for many people who die by suicide?
    12·2 answers
  • Which recommendation helps to choose foods sensibly?
    13·2 answers
  • Losing more fluids than taking in will cause hydration.<br> A. True<br> B. False
    5·2 answers
  • Also, guys help me. with the budgies, i have if ur a bird expert
    6·1 answer
  • The trapezius is a muscle that functions to stabilize which body part?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!