Question

what do u mean by germ layers

Answer 1

Germ layers are the primary layers of cell which differentiate in animal embryo.

Answer 2

 germ layers
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 germ layers are the primary layer of cells which are formed  during the process  of embryogenesis

there are 3 germ layers in animals having bilateral symetry  and 2 germ layers in animals who have  radial symmetry

the three germ layers are Endoderm , Mesoderm , Ectoderm and the organisms which have 2 germ layers will lack the Mesoderm 

germ layers will also give rise to the  tissues and organs by the process called the Organogenesis