Spanish influenza is thought to be caused by

Biology

2 answers:

diamong [38]3 years ago

6 0

It was caused by an H1N1 virus with genes of avian origin

s2008m [1.1K]3 years ago

3 0

The "Spanish" influenza pandemic of 1918–1919, which caused ≈50 million deaths worldwide, remains an ominous warning to public health. Many questions about its origins, its unusual epidemiologic features, and the basis of its pathogenicity remain unanswered. The public health implications of the pandemic therefore remain in doubt even as we now grapple with the feared emergence of a pandemic caused by H5N1 or other virus. However, new information about the 1918 virus is emerging, for example, sequencing of the entire genome from archival autopsy tissues. But, the viral genome alone is unlikely to provide answers to some critical questions. Understanding the 1918 pandemic and its implications for future pandemics requires careful experimentation and in-depth historical analysis.

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What chromosomal disorder is illustrated in Figure 14–9?

kodGreya [7K]

Answer is: nondisjunction.
Nondisjunction is the failure of homologous chromosomes to separate correctly during cell division, because of tha daughter cells have abnormal chromosome numbers. This example is failure of a pair of homologous chromosomes to separate in meiosis I.

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3 years ago

Why is salivary amylase active for only an hour or so, whereas lingual lipase isn't active until reaching the stomach

leva [86]

Salivary amylase will be active for only an hour or so because the optimum pH for activity of amylase is about 6.7–7.0 which is available in the mouth but the pH of the stomach is acidic around 1-2 due to which the amylase enzyme becomes inactive in short-time.

The lingual lipase enzyme is present in the saliva but isn't active until reaching the stomach because this enzyme is acid stable and works efficiently in the stomach, not in the mouth.

Amylase enzyme is secreted in the mouth and is responsible for the breakdown of starch in food into sugars and it starts acting as soon as we put food in the mouth whereas Lingual lipase enzyme is secreted along with saliva but it is not active in the mouth rather its activity starts in the stomach which is responsible for the degradation of triacylglycerol molecules.

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2 years ago

Why would it be hard to find the CO2 level if the light intensity were very low? HELP!!!!

drek231 [11]

If CO2 was in very small amounts then it would be the limiting factor of photosynthesis, this means the process will take place at a much slower rate because it is lacking one of the raw materials it needs for the process to occur. To find the optimum light intensity you really need all other factors to be at optimum levels or in abundance.

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A cytoprotective agent is also known as a(n) _____.

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It is also known as a rescue agent

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What is noice pullotion. pls po pasagot ;23 point po

luda_lava [24]

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