Вопрос № 236620 - Английский язык

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Dynamic meteorology research is based on the mathematical models.

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Diseases tend to spread more rapidly among hogs, 1_______, and other livestock that are kept in confined areas. Young animals also tend to become infected easily. Scientists conduct many research programs to 2_______ new ways of combating livestock diseases. These experts work to identify and eliminate the organisms that spread such diseases as salmonella and 3_______. Identification of specific genes that produce resistance to diseases can also lead to 4_______ animals.

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Competition is one of the key elements of any habitat.

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Quarantine has been recognized since the Roman times.

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Species are the key elements of biological classification.

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Two vertebrate species participate in the transmission cycle.