Q41. What is the smallest unit of heredity?
Correct: Gene
Gene is smallest hereditary unit.
Q42. Which vitamin prevents scurvy?
Correct: Vitamin C
Vitamin C prevents scurvy.
Q43. What type of blood cells help in clotting?
Correct: Platelets
Platelets help clotting.
Q44. Which organ stores urine?
Correct: Bladder
Bladder stores urine.
Q45. Which part of plant absorbs water?
Correct: Root hair
Root hairs absorb water.
Q46. What is the basic unit of life?
Correct: Cell
The cell is the smallest structural and functional unit of living organisms.
Q47. Who proposed the theory of evolution by natural selection?
Correct: Charles Darwin
Charles Darwin published 'On the Origin of Species' in 1859, outlining natural selection.
Q48. What is the powerhouse of the cell?
Correct: Mitochondria
Mitochondria produce ATP through cellular respiration.
Q49. Which molecule carries genetic information?
Correct: DNA
DNA (deoxyribonucleic acid) stores and transmits genetic information.
Q50. What process do plants use to convert sunlight into energy?
Correct: Photosynthesis
Photosynthesis uses light energy to produce glucose from CO2 and water.
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