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AlladinOne [14]
3 years ago
6

The virus that causes avian (bird) flu can attach to the cells of the lower part of the respiratory system in humans, but not to

the cells of the upper part of the respiratory system. The most likely reason for this is that these two groups of cells have different _________.
Biology
1 answer:
umka21 [38]3 years ago
7 0

Answer:

The correct answer is "receptors".

Explanation:

Virus infect and reproduce by recognizing specific receptors in their host cells. Virus-receptor binding is highly specific, this is the reason why some virus can infect only certain animals or plants at specific tissues. If the virus that causes avian flu attaches only to the cells of the lower part of the respiratory system, it is very likely that these cells have specific receptors that are not present in the upper part of the respiratory system, receptors that the viruses recognize.

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Answer:

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Explanation:

Animal agriculture simply refers to the extensive use of various cattles , birds and other animals and their derivative in contributing to the growth and development of the economy and it's populace. In the most evident of cases and scenarios, we can establish that animal agriculture plays important role in the economy which include but not limited to being an integral source of revenue for the state and local economy, provision of jobs and subsequent reduction in level of unemployment, an important source of protein such as meat, fish, poultry birds, eggs and so on.

Even in the most developed of economies, agriculture continues to be a main point of focus in most countries, contributing immensely to the GDP of the nation. Animal agriculture could be practiced from a relatively low scale level which has made it easy for individuals to be self employed and a resulting reduction in level of unemployment.

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This drug inhibits the growth of bacterial cells but not human cells. This is an example of the selective toxicity of antibiotics.

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Know more about selective toxicity here :

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