Because some turbellarians fail to add yolk to the egg cells as they undergo oogenesis,yolk cells surround the zygote to provide nourishment.This development is referred to as
A)endolecithal.
B)ectolecithal.
C)syncytial.
D)oncospherical.
E)hydatid.

Question

Quizplus · Accepted Answer

Ectolecithal refers to organisms where the egg cells contain little or no yolk, and instead rely on external sources of nourishment for development. In this case, the turbellarians fail to add yolk to the egg cells and rely on yolk cells surrounding the zygote for nourishment, which makes them ectolecithal.

Because Some Turbellarians Fail to Add Yolk to the Egg