Chu-lin's doctor tells her that her baby will have problems with its respiratory and digestive systems. the doctor explains that the problems originated when the zygote divided into the three major cell layers. evidently, in chu-lin's case, there was a problem in the formation of the

The answer is endoderm.

There is three type of germ layer in embryo, ectoderm(outside), mesoderm(middle), and endoderm(inside). The germ layer will dividing and maturing into different set of organs. The organ that derived from endoderm layer would be vary from gastrointestinal tract, respiratory tract, urinary tract, and auditory system.

they have sperm in my gf's mouth

explanation:

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek