1.

Reptile and bird eggs areA. MacrolecithalB. OligolecithalC. MesolecithalD. Alecithal

Answer» Correct Answer - A
(A) Type of eggs based on the quantity of yolk.
1. Alcithal eggs: Egg is almost free of yolk. e.g.: Eutherian mammals (Human), Marsupial (Kangaroo)
2. Microlecithal or oligolecithal eggs: Contains very small amount of yolk. e.g.: Rabbit, amphixus, sea urchin, tunicates.
3. Mesolecithal eggs: Contain considerable amount of yolk. e.g.: Petromyzon, frog and lung fishes.
4. Macrolecithal or Polylecithal: Eggs contains large amount of yolk e.g.: Insects, sharks, bony fishes, reptiles, birds and prototherian mammals.


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