Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?

The most serious environmental pollution from a nuclear reactor is

A temperature of 295 K is equivalent to approximately

Defect of colour blindness can be remedied by the use of

Which one among the following has the highest energy?

When 1 litre of water freezes, the volume of ice formed will be

Consider the following statements:
1. Biodiversity is normally greater in the lower latitudes as compared to the higher latitudes.
2. Along the mountain gradients, biodiversity is normally greater in the lower altitudes as compared to the higher altitudes.
Which of the statements given above is/are correct?

A new optical disc format known as the Blu-ray Disc (BD) is becoming popular. In what way is it different from the traditional DVD?
1. DVD supports standard Definition video while BD supports High definition Video.
2. Compared to a DVD, the BD format has several times more storage capacity.
3. Thickness of BD is 2.4 mm while that of DVD is 1.2 mm.
Which of the statements given above is/are correct?

The famous book titled ` system a nature ` was written by

Which of the following statement about `cell` is wrong ?