Flexi Says: Eggs can be of four types depending on the amount of yolk they contain - (i) Alecithal - The yolk is almost absent. eg. Human eggs (ii) Microlecithal - They have very little amount of yolk. eg. Tunicates. (iii) Mesolecithal - They have moderate amount of yolk. eg. Amphibians and Annelids (iv) Megalecithal - They have large amount of yolk. eg. reptiles and birds.
