Vitamin D is manufactured in a healthy human being by the action of _______ on the skin and absorbed in the blood stream.
ozone
radium
moonlight
sunlight
- It Is not advisable to sleep under a tree at night because of release of
- The dinosaurs (terrible lizards) became very successful during
- The blood clotting requires the vitamin
- When does the heart start functioning?
- Whooping cough is caused by
- In phototropism, auxins
- Those small organisms which float on the surface of water are called
- The specific gravity of blood
- The scientist who discovered the blood groups is
- Niche' refers to
- Veins carry blood
- Which organelle in the cell, other than nucleus, contains DNA?
- The disease in which blood clotting does not take place is known as
- What is 'atavism'?
- Which of the following contains the highest protein content per gram?
- Rh+ blood is due to genes which are
- The latest drug for cancer is obtained from
- Fat present below the skin surface in our body acts as a barrier against
- Loss of blood is
- Bacteria utilising radiant energy to prepare food are
- The protoplasm of a child is exactly the same as that of its
- Warm-bloodedness
- Antisnake venom is prepared by
- The plant cells are surrounded rigidly by
- Plague is caused by
- Which among the following diseases is not caused by viral infection?
- The counting of RBCs is done with
- Which one of the ecosystems Is the largest in the world?
- What is the bacterial disease in lime fruits?
- Sexual selection theory was propounded by