Question

quiz
1 which sentence from the article best supports the idea that flu strains can change?
(a) an especially dangerous type, such as swine flu or the increasingly common bird flu, can devastate farms, resulting in higher egg and meat prices.
(b) the possibility of a pandemic arises when flu is passed from a wild bird - migratory waterfowl and seabirds are the main sources - to a human.
(c) sometimes the animal is also infected by a human flu strain, which produces a mutant mix like the swine flu that killed about 284,000 people in 2009.
(d) people have no immunity to new strains of flu and existing vaccines do not protect against them, so they spread easily.
2 what information is left out of the section \the argument\ related to the effectiveness of flu vaccines?
(a) why vaccines are different each year
(b) how disease can spread on farms easily
(c) how well the vaccines work for very young children
(d) why a universal flu vaccine is recommended
3 according to the section \the situation\ and the map \how bird flu spread,\ what strains of avian flu were responsible for killing 48 million birds in the united states?
(a) h5n1, h5n2 and h5n8
(b) h5n1, h5n2 and h5n3
(c) h5n1, h5n8 and h7n7
(d) h5n1, h5n8 and h7n3
4 the map \how bird flu spread\ best supports which of the following ideas?
(a) poultry caused most of the human flu cases in 2014.
(b) avian flu spread to all continents in 2015.
(c) wild animals are the main source of flu outbreaks.
(d) multiple strains of flu can develop in birds.

Explanation:

1. Option C mentions the production of a mutant mix like swine - flu due to animal and human flu strain interaction, indicating flu - strain change.
2. Among the options, how well vaccines work for very young children is likely left out in a section about flu - vaccine effectiveness.
3. No information about the strains responsible for killing 48 million birds is given in the question to provide an answer.
4. A map of how bird - flu spreads would best support the idea that multiple flu strains can develop in birds.

Answer:

1. C
2. C
3. Information not provided in the question to answer this.
4. D