The eggs of birds contains relatively larger quantities of yolk than those of amphibians and reptiles because
Answer Details
The eggs of birds contain relatively larger quantities of yolk than those of amphibians and reptiles because embryonic development is longer in birds. Yolk is a food source for the developing embryo inside the egg, providing nutrients and energy for growth and development. Birds have a longer incubation period than amphibians and reptiles, which means that the developing embryo requires more nutrients to sustain its growth for a longer period of time. The yolk provides these nutrients in the form of proteins, fats, and vitamins, which are essential for the development of the chick. This is why the eggs of birds have a larger yolk compared to those of amphibians and reptiles, which have a shorter incubation period and require less nutrients for embryonic development.