What kind of cell clusters are formed by suspension culture?

"Give me a living cell of any plant and $I$ will give you a thousand plants of the same type". Is this only a slogan or is it scientifically possible? Write your comments and justify them.

In tissue culture,a single germinating pollen grain will form a ........ plant.

What is the technique of obtaining a large number of plantlets by tissue culture called?

Assertion : In plant tissue culture,somatic embryos can be induced from any plant cell.
Reason : Any viable plant cell can differentiate into somatic embryos.

$A$ piece of sterile plant tissue to be used for tissue culture under aseptic conditions is known as: