What are the strengths and weaknesses of the tobacco mosaic virus hypothesis

Biology

2 answers:

Elan Coil [88]3 years ago

7 0

Answer:

Strengths: crystallization potential

Weaknesses: dependent on the host plant

Explanation:

Smoke mosaic viruses caused by TMV (Tobacco mosaic virus) infect several plants. Symptoms induced by tobacco mosaic virus (TMV) are somewhat dependent on the host plant and may include mosaic mottling, necrosis, dwarfism, leaf curl, and yellowing of plant tissues.

The tobacco mosaic virus (TMV) was first observed by scientist Wendel Stanley (1904-1971).

This scientist, awarded the Nobel Prize in Chemistry in 1946, discovered the crystallization potential of TMV and the ability to infect and spread the virus in healthy plants (Tobacco) even after an extended period of latency.

From application and development, using electron microscopy, it was possible to verify that this virus manifests an external composition formed by a protein capsule, consisting of helically arranged globular proteins lining an RNA strand.

Normally, the most common consequence of viral action is related to plant development (decline in growth rate), ie contaminated plants grow less than healthy ones.

The mechanism of viral transmission is quite distinct, can occur through agents that inoculate the disease (a vector: insect, fungus and nematode), through pollen and seeds containing the virus, and even through a mechanism called diffusion. mechanized, where the crystallized virus settles in subsequent botanical specimens due to man-induced manipulation (mechanization in large crops).

liberstina [14]3 years ago

5 0

<span>Tobacco Mosaic Virus (TMV) will not multiply unless it is brought in contact with a living cell and once it contacts the living cell it will not stop its multiplication.</span>

You might be interested in

What effect does the stomach have on the digestive process?

Artist 52 [7]

(D) It uses enzymes to liquefy food and kill bacteria to be further digested in the intestines.

4 0

3 years ago

What does nicotine in cigarettes smoke cause

Oxana [17]

Since nicotine is a form of a stimulant drug, in cigarette smoke it can cause addiction.
Many people who smoke are actually addicted to smoking, and cannot stop doing so easily, which is similar to how drug addicts behave when it comes to using drugs.

7 0

3 years ago

Which of the following is not an example of organic matter?

SIZIF [17.4K]

Answer:

Bagged Fertilizers

Explanation:

A dead animal will decompose, along w/ coffee bean shells and seaweed. Fertilizers, which are made of chemicals, can not. Another way to think about it is u can eat anything but the fertilizers :-)

7 0

3 years ago

When roots take up mineral ions, they are built up against their concentration gradient. both anion and cation transport utilize

attashe74 [19]

I believe the answer is B, primary active transport. Root hair cells in plant use active transport to absorb mineral ions such as nitrates from the soil. The concentrations of minerals in the soil are lower in the soil than in within the root hair cell, therefore the transport will be against the concentration gradient which does not favor diffusion, therefore the pant has to use active transport.

6 0

3 years ago

(01.04 mc)water at about 4°c (39°f) is more dense than water at 0°c (32°f). why would the living organisms in the lake die if th

makkiz [27]

Didn't you say that the water at 39 degrees is more dense than water at its freezing point? I think the reason organisms would die is because the water already starting to structure in a crystal form, when it starts to freeze into ice. This probably why it kills the organisms, is because the water ceases to allow the organism to function at those temperatures.

3 0

3 years ago