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3 years ago

Why is avian influenza (H5 N1) rarely transmitted from poultry to humans? Why is it is often lethal

Biology

1 answer:

Olin [163]3 years ago

6 0

Answer:

Lacks the right key to unlock many cells.

Explanation:

Avian influenza (H5 N1) rarely transmitted from poultry to humans because it lacks the right key to unlock many cells in the upper respiratory tract so due to this action the virus is rarely transmitted to humans. Sometimes it is lethal to humans due to absence of antibodies for this type of virus. It is rarely spread from person to person due to inability to enters the other human body.

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"Explain how and why de-oxygenated blood is pumped to the lungs and is then returned to the heart were the blood now rich with o

Jlenok [28]

<h2><u>Heart and lungs:</u></h2>

The upper chamber of the heart is called atrium and lower chamber of the heart is called ventricles.

The blood circulation in the heart is basically under the functioning of three blood vessels namely:

<h3><u>Arteries: </u></h3>

They start with the aorta, the huge vein leaving the heart.
Veins divert oxygen-rich blood from the heart to the majority of the body's tissues.
They branch a few times, decreasing and littler as they convey blood more remote from the heart.

<h3><u>Capillaries: </u></h3>

These are little; flimsy blood vessels that associate the arteries and the veins.
Their dainty dividers permit oxygen, supplements, carbon dioxide, and other waste items to go to and from our organ's cells.

<h3><u>Veins: </u></h3>

These are the blood vessels that return blood to the heart; this blood needs (oxygen-poor) and is wealthy in waste items that are to be discharged or expelled from the body.
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6 0

3 years ago

A jet flies 2000 meters/minute for 120 minutes. How far did it fly?

Mrrafil [7]

Answer:

jet flies for 240000 metres

Explanation:

hope it help

8 0

3 years ago

There are 100 cats in a population that follows hardy-weinberg conditions. 4 cats display a recessive white coat color. how many

mr Goodwill [35]

We know that Hardy-Weinberg conditions include the following equations:

$p^{2}+2pq+ q^{2}=1$

where $p+q=1$

And where p = dominant, and q = recessive; this means that $p^{2}$ is equal to the homozygous dominant, $2pq$ is the heterozygous, and $q^{2}$ is the homozygous recessive .

So we have 100 total cats, with 4 having the recessive white coat color. That means we have a ratio of $\frac{4}{100}$ or 0.04. Let that equal our $q^{2}$ value.

So when we solve for q, we get:

$q^{2}=0.04$

$q=\sqrt{0.04} =0.2$

Now that we have our q value, we can use the other equation to find p:

$p+q=1$

$p+0.2=1$

$p=0.8$

So then we can solve for our heterozygous population:

$2pq=2(0.8)(0.2)=0.32$

This is the ratio of the population. So we then multiply this number by 100 to get the number of cats that are heterozygous:

$0.32*100=32cats$

So now we know that there are 32 heterozygous cats in the population.

8 0

3 years ago

in a way everything we eat depends on photosynthesis describe how a breakfast of bacon and eggs depends on photosynthesis

Leokris [45]

Both chickens and pigs are omnivores so they eat scrap, grain, and most importantly for this subject vegetables and fruits. Vegetables and fruits both came from photosynthesis, so when we eat bacon and eggs we are eating pigs and chickens that ate plants and vegetables that gained energy due to photosynthesis. At least that’s what I think

4 0

3 years ago

What is a nonliving cell structure

True [87]

Answer:

The cell wall is a rigid non-living layer that is found outside the cell membrane and surrounds the cell

Explanation:

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3 years ago