Who first discovered how blood circulates in the human body?

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Which of the following is not a part of Darwinism?

A. Over production B. Natural selection C. Inheritance for acquired characters D. Competition for survival E. None of these...

Which one of the following is a non-metallic mineral?

A. Manganese B. Magnesium C. Gypsum D. Bauxite E. None of these...

In humans , most nutrient molecules are absorbed by the ?

A. Small intestine B. Stomach C. Liver D. Large intestine E. None of these...

The most important stimulant in tea leaves is?

A. Brucine B. Caffeine C. Phenylalanine D. Theine...

The Sun is at an average distance of about________ million kilometers away from Earth?

A. 100 million B. 150 million C. 200 million D. 250 million...