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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Which organelle stores water and helps to maintain the plant cell shape? C D B E A F G H

coldgirl [10]

Answer:

H. Vacuole.

Explanation:

Vacuole is the organelle that is responsible for storing of water and helps to maintain the shape of plant cell. Plant cell has one large vacuole that maintain water balance in plant cell. vacuoles are also used to store cellular fuel by some cells in animals, plants, and microorganisms. In animals, vacuole is small and responsible for the storing of waste products that are produced in the cell.

8 0

3 years ago

One g of fecal matter was suspended in 99 ml saline solution (tube 1). After mixing gently but thoroughly, one ml from tube 1 wa

malfutka [58]

Answer: the cfu/g Gram-negative bacteria in the fecal sample is C = 3.0 × 10^3

Explanation:

We know that; Gram negative bacteria looks pale reddish in color under a light microscope from Gram staining.

therefore

There are 30 red bacterial colonies counted.

1 mL of from tube 1 was removed and added to tube with 99 mL saline (tube 2) dilution is 1/100.

transferred volume into the plate is 1 mL.

Now, we have to determine the cfu/g Gram-negative bacteria in the fecal sample

Formula to calculate CFU/g bacteria in fecal sample is expressed as;

C = n/(s×d )

where C is concentration (CFU/g) , n is number of colonies , s is volume transferred to plate , d is dilution factor.

so we substitute

C = 30 / ((1/100) × 1)

C = 30 / 0.01

C = 3000

C = 3.0 × 10^3

THERFERE, the cfu/g Gram-negative bacteria in the fecal sample is C = 3.0 × 10^3

3 0

4 years ago

All of the following are examples of limiting factors EXCEPT

Natasha2012 [34]

Answer:

Weather conditions

Explanation:

Food can be limited based on location, however, scientists can control what kind of food it is. Soil can be tested and experimented on. There can be a lot of it and different kinds. Space is fought over because of territories and is limited compared to how many people and animals there are. Weather is not something that can be controlled in an experiment since it is sporadic.

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3 years ago

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To solve a problem using the equation for Kepler’s third law, Enrico must convert the average distance of Mars from the Sun from

vovikov84 [41]

Answer:Enrico must multiply the distance of mars from sun (meters) with the $6.6844\times 10^{-12}$ to convert the distance in astronomical units.