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Sonja [21]
3 years ago
5

Tobacco mosaic virus (TMV) has been found in virtually all commercial tobacco products. Why, then, is TMV infection not an addit

ional hazard for smokers?
Biology
1 answer:
Georgia [21]3 years ago
4 0
TMV is not an additional hazard for smokers because the humans are not within the range of hosts of the TMV virus and so the humans cannot be infected. The Tobacco Mosaic Virus is actually a single stranded RNA virus that infects a wide variety of plants and especially the tobacco plants. The main signal is the discoloration of the leaves of the plants.
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Which component is missing from the process of cellular respiration?
liq [111]

Answer:Oxygen

Explanation: During cellular respiration, glucose is broken down in the presence of oxygen to form carbon dioxide, water and energy. Glucose + oxygen --> carbon dioxide + water + energy.

The balanced chemical equation for cellular respiration is C6H12O2 + 6O2 --> 6CO2+ 6H2O + Energy

3 0
3 years ago
Which of these statements best describes a Southern Blot?
gulaghasi [49]

Answer: Option A - Recognition of DNA sequence by a DNA or RNA probe

Explanation:

Southern blot helps to get the sequence of DNA that is complimentary to the DNA or RNA probe used

3 0
3 years ago
Why does the starch remain present and is detected by iodine in the boiled solution?
skad [1K]

Answer:

Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine. The iodine molecule slips inside of the amylose coil. ... A blue-black color results if starch is present. If starch amylose is not present, then the color will stay orange or yellow. I hope this helps!

4 0
3 years ago
1. Since more offspring are produced than an environment can support, organisms within a population must compete for resources t
charle [14.2K]

Answer:

4. Variations that help with survival will be passed on to future generations and will rapidly change the whole population.

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Variations that help with survival MAY be passed on to future generations, depending on how much pressure that variation relieves. Change may not be rapid, depending on how fecund the species is. Also, it will not change the whole population, only future offspring. The current offspring won't all have the new variation.

5 0
2 years ago
What is the valve that controls the entrance to the stomach and prevents backflow to the esophagus?
xenn [34]

Answer:

Lower esophageal sphincter

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The biological valves are the muscular structures composed of the smooth muscles which form thick tubular structure to allow the controlled movement of any material through it. The valves in the digestive system are known as the sphincters.

The sphincters control the unidirectional movement of the eaten food, chyme and the bolus in the digestive tract.

A sphincter is present at the lower portion of the oesophagus (food pipe) which contracts to prevent the backflow of the food from the stomach and since the sphincter is present at the lower side of the oesophagus, therefore, is known as the lower esophagal sphincter.

Thus, Lower esophageal sphincter is correct.

6 0
3 years ago
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