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0:16
What is the powerhouse of the cell?
1 year ago
0:14
What is the center of an atom called?
1 year ago
0:20
What is the chemical formula of water
1 year ago
0:15
: Which organ in the human body is responsible for pumping blood?
1 year ago
0:15
Which particle is responsible for the negative charge of an atom?
1 year ago
0:14
Which planet is known as the"red planet"?
1 year ago
0:18
What is the process by which plants convert sunlight into the chemical energy?
1 year ago