Questions

The USSR( now a Common Wealth of Independent States) is spread over Europe and Asia

Phototropism is the ability of a photosynthesizing organism, to grow directionally in response to a light source. It is very common in plants, but can also occur in other organisms such as fungi.

Example :: Sunflower

Handwritten wills are also known as Holographic wills since they are made by the persons called testators without notary or any witness.

Polo

Convection is the mode of heat transfer which involves bulk motion of a fluid to transfer heat. Energy transfer by convection is primarily restricted to fluids. Fluids can be both liquids and gases.