The reason for the browning of the cut apple is present in the apple-

Which of the following can be used to complete an electric circuit if one runs out of connecting wire?

Which of the following statements is not correct? 

Which nutrients help our growth?

Which one of the following did experiments with pea plants and found that pea plant has some traits which come in pairs - such as rough or smooth, tall or short, yellow or green etc.?

Which of the following instruments is used for measuring the depth of the ocean?

Which of the following is that part of the human body, which is responsible for the balance of water-

Where is urea manufactured?