If a plant shows a symptom which could develop due to deficiency of more than one nutrient, how would you find out experimentally, the real deficient mineral element?

There are two wires. One of them carries a current . How will you find out which one carries a current ?

Which diseases are caused due to deficiency of nutritive substances/nutrients ? Which are their symptoms ?

(a) Magnetic field lines show the direction (at every point) along which a small magnetised needle aligns at the point). Do the magnetic field lines also represent the lines of force on a moving charged particle at every point? (b) Magnetic field lines can be entirely confined within the core of a toroid, but not within a straight solenoid. Why? (c) If magnetic monopoles existed, how would the Gauss's law of magnetism be modified? (d) Does a bar magnet exert a torque on itsell due to its own field? Does one element of a current-carrying wire exert a force on another element of the same wtre? (e) Magnetic field arises due to charges in motion. Can a system have magnetic moments even though its net charge is zero?

Which of the following statements are true? If false, correct them: (a) Boron deficiency leads to stout axis. (b) Every mineral element that is present in a cell is needed by the cell. (c) Nitrogen as a nutrient element, is highly immobile in the plants. (d) It is very easy to establish the essentiality of micronutrients because they are required only in trace quantities.

To show vegetative propagation by stem cuttings. Materials : Money-plant (pothos) Procedure: rarr Select a money-plant. Cut some pieces which contain at least one node of leaf. rarr Cut out some other portions between two leaves. rarr Dip one end of all the pieces in water. rarr Observe over the next few days. Can you give some other example to show vegetative propagation by stem cuttings ?

Find out from your grandparents or other elders ………… (a) how did they go to school? (b) how did they get water for their daily needs when they were young ? (c) what means of entertainment did they use ? Compare the above answers with how you do these takes now. Is there a difference? If yes, in which case more energy from external sources is consumed?