The egg of bird is _ type.

Explanation

The egg of bird is polylecithal type. "Polylecithal" is a term used in embryology and biology to describe a type of egg or ovum that contains a relatively large amount of yolk. The yolk is a nutrient-rich substance that provides the developing embryo with the necessary nutrients and energy to support its early growth and development.Polylecithal eggs have a relatively large amount of evenly distributed yolk throughout the egg cytoplasm. In contrast, telolecithal eggs have a small amount of yolk concentrated at one end, often referred to as the vegetal pole, while the animal pole contains very little or no yolk.In polylecithal eggs, cleavage, the process of cell division that occurs after fertilization, is typically incomplete or superficial because the yolk restricts the ability of the dividing cells to move freely. This results in the formation of a blastodisc (a single-layered structure) or a blastoderm.Some examples of animals with polylecithal eggs include frogs, salamanders, and reptiles like turtles and birds. These organisms have adapted to the challenges of developing in eggs with relatively large amounts of yolk.