What percentage of research animals are dogs, cats & primates combined?

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Multiple Choice

What percentage of research animals are dogs, cats & primates combined?

Explanation:
The key concept is that the vast majority of research animals are rodents, especially mice and rats, while dogs, cats, and nonhuman primates represent only a tiny fraction. Because rodent use dominates the totals, the combined share of dogs, cats, and primates is well under 1% of all animals used in research. This reflects factors like cost, housing needs, and a regulatory and welfare emphasis that makes larger mammals less common in scientific studies. The other options imply a sizable portion, which does not align with the typical distribution of species used in research.

The key concept is that the vast majority of research animals are rodents, especially mice and rats, while dogs, cats, and nonhuman primates represent only a tiny fraction. Because rodent use dominates the totals, the combined share of dogs, cats, and primates is well under 1% of all animals used in research. This reflects factors like cost, housing needs, and a regulatory and welfare emphasis that makes larger mammals less common in scientific studies. The other options imply a sizable portion, which does not align with the typical distribution of species used in research.

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