OPENMAT Question:

Which of these is a modified underground stem
(1) Radish
(2) Carrot
(3) Sweet potato
(4) Potato

Sweet potato

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Bats can sense obstacles because they produce (1) Supersonic sound waves (2) Ultrasonic sound waves (3) Infrasonic sound waves (4) Micro sound waves	Who has authored the book Caesar and Cleopatra? (1) William Shakespeare (2) Charles Dickens (3) George Bernard Shaw (4) Matthew Arnold