Questions

In flowering plants one sperm nucleus fertilizes the egg and the other sperm nucleus fuses with two other nuclei found within the ovule, thus forming triploid endosperm.

Hence, double fertilization is unique to flowering plants.

By adhering to the green building norms for its residential colonies, the Delhi metro Railway Corporation (DMRC) has become the world's first completely green metro.

The Indian Green Building Council (IGBC) awarded the Delhi metro the platinum rating for adhering to the green building norms for its 10 residential colonies.

The World Hydrography Day (WHD) is observed every year on June 21 to publicise the work of hydrographers and to create awareness about hydrography which is an essential science before undertaking any activity on or under the sea. The 2017 theme is “Mapping our seas, oceans and waterways – more important than ever”.

Carbon dioxide is present under pressure in soft drinks.

The persons with 'O' blood group do not have antigens in the red corpuscles. So that blood will not cause agglutination of corpuscles if mixed with any type of blood. So group 'O' persons are called universal donors.