Read the passage from "yellow fever." about 15 percent of people who fall sick feel better for a day, but then the disease progresses to a more dangerous form. the next stage can include high fever, internal bleeding, unconsciousness, and harm to the heart, liver, and kidneys. liver damage is like a poison, and it causes people's skin and eyes to take on a yellow color. yellow fever gets its name from this symptom. in the end, 20 to 50 percent of people who develop the more severe type of yellow fever die. which best describes why the author includes this information in the article? to convince readers to avoid places where yellow fever occurs to encourage readers to educate others about yellow fever to frighten readers into getting vaccinated for yellow fever to readers understand the effects of yellow fever

Explanation:

  In this article, the author wanted to explain about yellow fever, putting some data about this disease, alerts and how to identify it, its reactions. Yellow fever is an acute febrile infectious disease, caused by a virus transmitted by mosquito vectors. This disease has two sort of cycles: wild (when there is transmission in rural or forest) and urban. The virus is transmitted by the bite of infected transmitting mosquitoes and there is no direct transmission from person to person.  

  Yellow fever has epidemiological importance because of its clinical severity and potential for spread in urban areas infested with the Aedes aegypti mosquito. The yellow fever mosquito can live in forests as well as in the urban environment, where the greatest proliferation of yellow fever occurs, as this mosquito can infect a larger number of people.

  The main symptoms are: The initial symptoms of yellow fever are:

1. sudden onset of fever;

2. chills;

3. severe headache;

4. back pains;

5. body aches in general;

6. nausea and vomiting;

7. fatigue and weakness.

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explanation:

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c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.