In which of the following groups of animal the heart pumps only deoxygenated blood?
1). Fishes
2). Reptile
3). Birds
4). Amphibians
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1. Mitochondrial membrane is a double layered structure composed of—
2. Light houses are places with powerful lights to
3. An oil drop spreads over water because
4. The Instrument used to see the distant objects on the Earth is
5. Lungs have a large number of alveoli for
6. In which of the following activities silicon carbide is used?
7. Which of the following is a flightless bird?
8. Diamond is harder than graphite because of
9. Which of the following is called the 'Father of White Revolution' in India?