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olya-2409 [2.1K]
4 years ago
11

Base your answer to the following question on the information below and on your knowledge of biology. After the Aswan High Dam w

as built on the Nile River, the rate of parasitic blood-fluke infection doubled in the human population near the dam. As a result of building the dam, the flow of the Nile changed. This changed the habitat, which resulted in an increase in its population of a certain aquatic snail. The snails, which were infected, released larvae of the fluke. These larvae then infected humans. This situation best illustrates that (1) the influence of humans on a natural system is always negative in the long term (2) the influence of humans on a natural system can have unpredictable negative impacts (3) human alteration of an ecosystem does not need to be studied to avoid ecological disaster (4) human alteration of an ecosystem will cause pollution and loss of finite resources
English
1 answer:
Elena-2011 [213]4 years ago
8 0

Answer:

(2) the influence of humans on a natural system can have unpredictable negative impacts

Explanation:

According to the text, parasitic blood-fluke infection increased after the construction of the Aswan High Dam. Thus, the flow of the river changed, affecting the habitat of the aquatic snail that produces the larvae. As a result, the impact of humans can have negative consequences in the environment.

The rest of the options are incorrect because the text does not suggest that human influence is always negative, nor that it causes pollution or loss of finite resources. Finally, the paragraph does not mention either that human alterations should not be studied.

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Step 1:

Wash your hands. To prevent the spread of diseases, wash your hands carefully and thoroughly with warm water and soap. Lather the entire surface of the front and back of the hands, rubbing in the soap for at least 20 second. Rinse and dry hands well. Don't touch the faucet or door handles with your clean hands. Carry a bottle of alcohol-based sanitizer with you to clean your hands when you can't get to a sink.

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Stay away from sick people. If you see someone sniffling, sneezing and coughing, keep your distance. Many illnesses can be transmitted through the air, and you can pick them up just by breathing air that was coughed or sneezed into. Avoid people who are sick, as much as possible. If you're sick, do everyone a favor, and stay away until you're better.

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Contain your own germs. If you sneeze, grab a tissue and cover your nose. Completely cover your mouth when you cough. Wash your hands frequently, don't touch others and properly dispose of any tissues or products that contain your germs from coughing and sneezing.




Step 4:

Give your body time to heal. If you've got a fever and are sick, stay home until you're better, and not contagious. Call in sick to work or school. If you have a bacterial infection, and your doctor prescribed antibiotics, take them as directed to kill the bacteria and reduce the risk of spreading the disease.

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Get immunized. Immunizations can be effective in stopping the spread of disease keeping you from both getting and giving a disease. Get any immunizations that are recommended for your age and risk factors. Get vaccinated against pneumonia and the flu.

P.S. i hope this answers your question!


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