Telolecithal egg refers to the type of egg that has a small amount of yolk concentrated in one area of the egg. The rest of the egg is mostly made up of cytoplasm. The correct answer to the given question is option 'B' - the yolk is found on one side of the egg.

Explanation:

The term "telolecithal" comes from the Greek words "telos" meaning "end" and "oleum" meaning "oil". Telolecithal eggs are found in animals such as reptiles, birds, and monotremes. In these animals, the yolk is concentrated in one area of the egg, usually at one end, while the rest of the egg contains cytoplasm and other organelles. This type of egg is different from centrolecithal eggs, which have a large yolk in the center of the egg.

The concentration of yolk in one area of the egg has several advantages for the developing embryo. The yolk provides a source of nutrients for the embryo as it develops, and having the yolk concentrated in one area allows for easier distribution of nutrients to the developing embryo. Additionally, having the yolk concentrated in one area allows the embryo to form specialized structures, such as the amniotic sac, which surrounds and protects the developing embryo.

In summary, telolecithal eggs have a small amount of yolk concentrated in one area of the egg, with the rest of the egg mainly consisting of cytoplasm and other organelles. This arrangement allows for easier distribution of nutrients to the developing embryo and the formation of specialized structures to protect the embryo.