23 сент. 2013 г. · Challenge yourself with a grade 9 biology quiz. Explore topics like photosynthesis, evolution, and anatomy. Take this quiz and challenge ...

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1) The cells responsible for defending our body against microbial invasion are: a) red blood cells b) white blood cells c) platelets

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Test your knowledge of science with this quiz for Class 9 students. Identify the chemical symbol for gold, distinguish renewable sources of energy, and recall ...

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